Overall it's readable.
ML is extra super duper creep and I suspect that he is a sociopath, because he's incredibly good at manipulating FL into doing everything he wants. He's perfectly aware that he's handsome and that FL is weak for handsome faces, so he uses all his strong points to manipulate her into his creepy sht. Also he very conveniently remembers about his bad school/childhood experiences and plays innocent to escape any type of responsibility for his stalker/creep/s**ual assaulting behavior. FL is... How do I put it... Not the brightest, but cheerful and nice person. She should be careful about what ppl she has as friends, because her gf is another creep in this story.
I take my words about FL back - she completely lacks any sense of self-preservation, like no survival instinct at all...
Tonari no Seki no Hen na Senpai