pls help me find this manga ( •̯́ ^ •̯̀)♡

its about a delinquent uke and he met the seme that is taking care of a pet or something in the lab (it eats rat or something) and then the uke always goes to the lab or club room to meet the seme. theres this scene that the uke is eating his bento and the seme notices that the bento have a little portion, its because the uke has sisters that eats little, so their mom thinks he eat less too. the next day, the seme prepared bento for uke.

the scene that i really love is that when the uke was avoiding the seme, uke is in the library and he was about to stab/throw hands with someone and uke’s friend sees the seme and called him and when the seme said “what are you doing”, the uke quickly retreat and blush, everyone called seme “the tamer” or something