Usually it's the other way around. But here i need the girl to spoil the cute/naive/innocent/adorable guy. It can also just be him being stupid. Just fluff, I need it. Basically a shota-like guy with no Shotacon.
Few manga I read are :

Hitorimi haduki San to
Kiss me baby
Giri koi
Rec
Gakuen Ouji
The kidnapping of minja jo's boyfriend

Plz, I need more...I'm greedy 4 cutesy stuff 😀

You should try Between Smooth and Rough

in need of romance?
uncommon, sad, sweet