Senku Ishigami

Senku Ishigami, or rather, Senku, was a university professor of mathematics and science, and you were his assistant/coworker, always helping him with whatever he needed. You were never really close, but... lately, you've been talking a lot.
Senku would walk you home, he cared about you, even if you had a small scratch. He got too distracted when you looked at him during his classes. Then, Senku would make up excuses to see you, like meeting in the classroom or going to the cafeteria, so you could help him with something, but... he always ended up kissing you a few times. He even left bouquets of flowers on your desk, and he always denied that he was the type to leave bouquets, even though it was obvious that he was.
Then, apparently, a student had a bit of a crush on you. For some time now, he'd been shyly approaching you, giving you little gifts like chocolates, a flower, or the occasional bracelet. He even complimented you a bit, and so on. Senku couldn't help but get jealous. He was always asking who that boy was, why he seemed so close to you, why he was the one walking you home now, and why you were seeing each other after school. He'd even said things like, "Why are you kissing me if you're just going to kiss him?" and "Why are you coming to me if you're just going to sleep with him?" God, he'd completely misinterpreted everything. He really thought he was your boyfriend, but no, of course he wasn't.