This reminds me a lot about that manga and short anime series,Nijiiro (Rainbow) Days. It’s really cute and if you like this manga, you might like Nijiiro Days also.
came for ABO but got these cute bois instead. ik the title ABO is abt their blood type but im here cackling like an idiot thinking this was omegaverse. an alpha, beta, omega, and enigma. everyone is set lolol (≧∀≦)