Actually what LS said is not quite right oh... King Marriage and Demon Marriage are a bit difficult if you want to get all the CGs, it's not hard to just get out the ending, and Dragon Marriage is one of the easiest endings of the three to nail.
The following is my personal experience, I didn't use a modifier (I don't use modifiers when possible) because I haven't played in a while so I won't be too detailed, but I have a general direction.
First of all, keep one thing in mind: don't be too conservative with your money in some cases!
First, the values.
The first year before the harvest season, without saying a word, follow the path of physical strength and martial arts: every month is martial arts + farm + rest, but be careful when fatigue is not too high to go to the king's city to talk to the guards, so there are two advantages: one is that you can get the qualification of etiquette courses, and the other is to increase the popularity of the higher the visibility of the lower the price of the store, up to 50% discount! (But that's for later.) Then after the Harvest Offering hurry up and get the dances (that is, go out twice after meeting Kristina, going to the clothing store, the busy street, the plaza, and the street in that order), and take more dances next, but make it to 5 liturgical lessons by the next year (meaning April 1441).
The first month of the second year you have to go out and rush to the square to get the maid job, then it's dance + maid + rest, or martial arts + maid + rest if you have nothing else to do, but I'm doing this to make money by attending the dance at the harvest festival in the second year... Because dance is easier to win than martial arts.
After making 3000G (or 700G if you can't) this year, you can let go of martial arts, and preferably magic (still to make money), until the next year...
In the third year, it is best to work hard in June-August, or worse, stop working, and specialize in martial arts and magic, so that you will have a better chance of winning the Harvest Festival... By the time you get to the Harvest Festival, if you have money, buy some weapons, if you don't, just go light (whether you have money or not depends on luck and how successful you are at your usual part-time job), and when you attend the Harvest Festival, you can use the SL method (you know this one...) You can use the SL method when attending the Harvest Festival (you know what I mean...), and at the very least earn 1000G, I can SL to 3000G... Then repeat the previous martial arts/magic + maid + rest, even if the martial arts and physical strength over the requirements should continue to practice, in order to make money... And charisma is not a concern at this point, with the previous dance foundation as well as working as a maid from time to time, charisma can easily exceed the requirements. However, the maid's flaw is lowering self-esteem, this need not be concerned, because after winning at the Harvest Festival not only make money to earn popularity but also add self-esteem...
According to this pattern, soon the physical strength charm self-esteem martial arts gods and goddesses are far beyond the requirements, leaving only the feelings. In fact the previous dance foundation helped add some feeling, the rest was taken care of when martial arts and magic were enough to learn the arts for a while while while winning the harvest festival... As for drawing or not drawing doesn't matter, you can upgrade without it...
The values are just about done. Easy, by the last year or two big time eating and drinking (since my martial arts magic was unbeatable by then...). Liljie was killed in two seconds by my magic, and Kallen was killed in one second by my martial arts... In fact, if I fought Liljie in martial arts, or Carine in magic, I would win... By the time I was able to destroy them, the others would be a piece of cake, since they're the strongest...) .
Another small detail, it's best to buy the Cat's Eye Stone when you meet the Mystic Merchant, and then go to the Magic Shop in the Magic Realm twice later, and exchange the stone for the Cat, so that you can go to the Magic Shop from the menu on the main screen to buy stuff later, but you don't need to buy it if you follow my path... Because the magic store is all about value changing stuff...
About eating at the restaurant, don't eat for the first two years because it will make you unable to dance, but then just do whatever you want, even though you'll have a lot of time to rest later on...
About getting Leigh, it's actually much easier than the other two princes as well. This was already listed in detail by LS, but I'll talk more about it in terms of my experience. （
The fifth to sixth year is mainly in the prosperous street, the square to go back and forth, in the middle of the market, there is a time to go to the street, there is a time to go to the street, to that time has been more time, as long as the last time a month to go out on the line, out of the first to go to the prosperous street, if there is no plot and then go to the square, pay attention to If there is no drama, you can go to the market once, and then to the street once, and if you can't go there this month, you can wait until next month to go to your next destination. The key is the first month of the sixth year (April 1445), be sure to go to the black street twice! Then in the second month of the sixth year (May) go to Black Street twice more! (The third time of these two months is still going to Leigh.) The purpose of doing this is to get to know Little 8 (i.e. Baloya, with Little 8 as a nickname), however, there will be three events of higher priority before you get to know him, one when your daughter first arrives on Black Street (which can be omitted if you've been there before, so just go to Black Street once in the second month of the sixth year), and two conversations about working part-time. After surviving these two months, in the sixth year, from June until October (54 Harvest Festival...) You have to find time to go to Black Street once, until Little 8 reveals about the Gate of the Magic World, by which time Leigh's side must have already told his daughter that he is a Dragon, so going to the Valley of Dragons in the Magic World openly is ok, and then you don't have to look for him until your daughter grows up in the seventh year. Regarding the fifth year of the founding festival, it is not recommended to go there, because Charolu is always in the square "messing up" so that the daughter can not touch Leigh, but if you want to get the CG of him dancing with Cristina, you can go there, but it is recommended to play the Magic Marriage to do so again... (I'm playing for the CG collection, and I've already got all the event and travel CGs...)
Seventh year (here comes the question about whether or not to continue to get along with Little 8 and whether or not to see the mother, I'm going to continue to suck up to Little 8 because my favorite character in PM4 is Little 8, but the next part of my narration is not to get along with him and not to see the mother, after all, that would take care of Leigh as well. (If you need to achieve these two points, please refer to LS) and the same as before, or every time you go out first to go to the prosperous street, no plot and then go to the square, there is no plot to go to the restaurant once (only once), and then there is no need to be busy, that is, the human world has been fully triggered, to the 1447 (before April on the line) to go to the magical world of the Valley of the Dragon to get the gowns and go on the line. (Note that here there is a black street robbery event, of course I believe you will choose lee...) Didn't care, it doesn't matter if you want to play Dragon Marriage Little 8's side of the relationship or not, and save Little 8 from robbing Christmas... (Though I do like him more...)
The eighth year, at this point there are only two events left, it does not matter if they are triggered or not, and because of this LS did not mention these two times, but I still blindly stumbled upon a dead mouse (after all, there is a CG with Leigh).... ...June 1447, go out to the streets, get the last CG with Leigh, and afterwards have a few chats with him in the square in August, and then disappear...
The rest is just a matter of waiting for Leigh to "abduct" his daughter after March 31, 1448... (Actually, that's a better word for Little 8...)
All of the above is hand-typed! Please forgive me...