buy's activites

sorry but I cant sleep cos I cant find this yaoi manga that i read before.Iirc Its about this guy who was tryna build a bird prototype that can fly then the other dude is like this super smart dude who has a half tattoo then he helps the mc make the bird named piyo or peeko or smthin

A comedic, slice of life romance between a popular senior Sungyeon and a normal university student H...