First of all, Yak'er is a philanderer because he knows that he has progeria, and his life is not going to be long, and he knows that he is incapable of curing it, so he indulges himself. In fact, he has always been lonely inside, and he only likes to seek short-lived warmth, and dares not move his true feelings, that is, he is afraid that in case he dies early from progeria, his beloved will be very pitiful. That's why he likes to go to the brothel, to Ye Meng color frivolous.
Again, let me tell you about the development of the relationship between Yak Er and Boss Yan:
0) After Boss Yan is captured by Bai Qingshu to be a human being, Yak Er travels alone to see Zou Zhi and confesses her feelings out loud in public and attempts to trade her own for Boss Yan, as a hostage.
1) medicine child because of the offense of the heavenly desire palace, and then return home to save their own big brother, was Zhang Xing hand backstabbing (that is, Shen Xingnan sent that spy, and was later found, died in the Liu burning in the sword), after being hit by a palm, fled to the Yan boss's inn, have Yan boss careful care, only to get well very quickly.
2) Zou resigned because of the tomb raiding to catch Yan boss (in fact, Yan boss is a tomb raiding female thieves), medicine at first to help Yan boss to hide their identity, and later to help her to remove the scars, and then to know that the identity of the boss Yan exposed, Zou resigned to catch the boss of the boss of the boss of the Yan, on the sneaky advice to take the boss of the Yan away. Later on, he also handed over Huma boss's son Xiaoshan to learn the art of medicine.
Boss Huma by this time was already in love with Medicine.
3) Medicine is struggling to find the Seven Great Hatreds. After learning about this from his son Xiaoshan, Boss Huma is willing to die to help Medicine find the Seven Great Hatreds. The elder brother of the medicine child also advised the medicine child, saying that Boss Huma is different from other women, hoping that the medicine child can take their relationship seriously.
At this point in time, Yak's love for Boss Huma has also grown.
Here's something I'd like to add: Yan Yelai is not some little widow whose husband died, and you're fast-forwarding through this part of the movie too much. Yan Yelai stayed as his ex-husband's wife to repay his kindness.
And also, Yak'er wasn't a dead hearted philanderer, he just indulged himself because he was bitterly incompetent against premature senility. Besides, he himself didn't realize at first that progeria could eventually be cured, and he couldn't predict that he would meet Boss Huma in the future, so I'm sure if Yak'er had known about these futures, he wouldn't have indulged himself.
Also, by the tone of your voice, you don't seem to like the character of Boss Huma. Actually, there are many things about Boss Huma that attracted Yakul.
Firstly, women in the past, when they saw that Yakuo was a handsome man, they would always flock to her. Boss Huma had no favoritism towards Yakuo from the beginning, and she was always indifferent to Yakuo's flirting, which made Yakuo feel that Boss Huma was very special and different from other women.
Secondly, Boss Huma's identity as a female flyer was also very attractive to Medicine Er. There is a saying among women: if a man is not bad, a woman will not love him. I believe that for Medicine Er, this should be: if a woman is not bad, a man will not love her. Moreover, Pill was usually different from the general world, the more challenging and exciting things were, the more he would be interested instead.
Thirdly, the fact that a woman, all by herself, is taking care of such a big inn, with a son, and a wicked mother-in-law, also makes Medicine Er admire Boss Yan's personal ability.
Fourth, Boss Yan can gamble. Mahjong, Pai Gow are all good at it. You have watched the TV series, you should know that Yak'er usually, besides going to the brothel and going home, is to go to the gambling house to gamble. Such a woman who is proficient in gambling, such a woman who is different from other women, how could she not attract Yakuo!
Ps: so many words, so tired.