pls help me find this manga, i have been searching for it for a while, i think it's probably shounen ai

the protagonist is a highschool boy who likes this anime about robots or something, and then there's a kouhai/senpai who confesses to him (probably senpai). the senpai likes the anime about robots too so they kinda stick together
the protagonist also has this otaku friend i think? and so at some point there's another guy who also gets interested in the main character because he thinks he's a girl at first

anyway i remember most of the story and i think the name is something like "(senpai's name), you are so..." but i can't remember the character's names so i still can't find it anywhere

Tashiro-kun, Kimi tte Yatsu wa