Yellow Hearts (Bokuakakuroken)

Kenma is in love with his best friend who is in love with his best friend who is in love with his best friend who is in love with someone who's in love with their best friend

Or

Kenma is woken up by a devastating realization that he's in love with his best friend Kuroo. Kuroo falls in love with his newest best friend and is distraught when finding out Bokuto loves his best friend Akaashi. And Akaashi just wants the blonde boy who loves video games to notice him.