As September comes, a new semester has begun at Shan Ming Highschool. The school doctor, Song Yue, welcomed a new roommate - the canteen chef, Xu Xiaodao. Mr Song thinks Xu is like the "Snail Girl". Ever since he started living here, the dorm has been super clean. Not only does he clean, but he also cooks all the meals and does all the laundry! This is genuinely suspicious! Things get even weirder when Mr Song realises Xu Xiaodao knows too much about him and is too clingy. Xu Xiaodao cares for him way too much?? Things are not as simple as they seem...