HELP! CAN'T REMEMBER THE MANGA

I'm trying to remember a manga that I had read before but I can't. It was about a guy(he wears glasses) that has only older sisters(two I think?) that's why he likes cute stuff like plush toys etc. other people don't know, except from the people who are close to him, sorry I don't remember this very well. Also he is antisocial and has black hair and he works as a cashier at a fast food(if that helps). And then a guy (who is his kouhai,I'm not sure) who has light hair and is really popular falls for him. And they go on a date at a festival and the first guy sees a cute llama as a prize of an arcade and the second guy wins it and gives it to him. I don't remember any sex scenes but in general it's really fluffy. Does the description remind you of anything? Ps. sorry for this mess...