I read it only for yandere seme but it turns out that uke is also obsessed over seme them being childhood friend and seme being yandere since he was young is totally blowed my mind especially when teacher told him to give flower he made to give someone special (like mom or grandma) but little version of seme be like I want to give it yuu nii why my mom and grandma has to do anything with it lol I just got creepy vibes from him , he is not that much creepy since I have read way worst than this seme , it's unexpectedly good and nice one.
Osananajimi Irony