Senpai ga Uzai Kouhai no Hanashi S01

Igarashi Futaaba's new job would have been great if his senpai, Takeda Harumi, wasn't so infuriating. Futaaba can't stand his laughter, hates how huge and big he is, and really hates how he treats him like a child. Just because Futaaba is short and young doesn't mean he's a kid; and just because he spends a lot of time with Takeda doesn't mean he sees him as anything more than a senpai on his nerves... or does he see him in a different way?