The first time it's sung is in episode 5 of the original (16 episodes)~
Episode 5
Young Jae's grandmother wants Young Jae and Ji Eun to move in together, making it difficult for Ji Eun. Young Jae's manager hints that Young Jae is in love with Ji Eun, but Young Jae denies it. Ji Eun rushes Young Jae back and tells him that Grandma wants them to move in together and they go to Grandma right away to settle the matter. The grandmother is very critical of Ji Eun and she sings "Three Bears" to cheer her up, but only Young Jae's father applauds in appreciation......
The second time was also in the original episode 7~
Episode 7
......Young Jae is always telling Ji Eun to do this and that, torturing her for fun, and in the end, he even makes Ji Eun cry, so he has to sing "Three Little Bears" to make Ji Eun happy......
< p>Secondly in the original episode 9~Episode 9
......Young Jae decides to invite Min Hyuk to his home, and Ji-eun doesn't know how to cook, so she turns to her grandmother for help. In fact, grandma doesn't know how to cook either, but she copied some recipes to fool Ji Eun. Ji Eun was very angry, so grandma had to sing "Three Little Bears" to make Ji Eun happy. ......
Episode 10 is also available~
Episode 10
...... Young Jae said something wrong again and made Ji Eun angry, so he had to sing "Three Bears" to make her happy ......
The two methods above will definitely be found!