When you love someone, you don't know where it started, but it goes deep. Lan Qin and his son, due to their parents' work, were away from home all year round and rarely returned to their hometown. Because their father accidentally fell and injured themselves, they needed to rest. The father and son returned to Qingxi Village during the winter vacation. Unexpectedly, the boy encountered the obsession of youth here. Who would have thought that the love of a 15-year-old boy would be so sincere and stubborn, lasting forever at a glance. After the 20-year-old Su Wan was confessed by a boy who was 4 years younger than her, she refused decisively on the grounds of her age. She only thought it was the ignorant impulsiveness of youth, thinking that the boy had already let go. She did not know that the boy was so persistent and affectionate, and the chance encounter in college was actually premeditated by the boy.