17-year-old man and foul-mouthed Kim Yeo-ju

Summary of the content so far

So far, Yeo-ju and Seok-jin have been fighting because of their 100-day anniversary. Yeo-ju doesn't remember and is upset because Seok-jin treats her indifferently.
(I think I need to roughly organize the situation, and I'll upload the second half next time and just finish it...)