I've been looking for some yaoi manga where either the uke or the seme are really shy/sweet/innocent in fay to day life but when they do the deed he goes crazy and is a complete beast in bed and dominant (like i said including uke so bring on the power bottoms!).

It would ne really cool if the partner is the reverse (loud and extroverted normally but shy and submissive in bed) but it's not necessary.

I think Ore Dake Mi Nai to xx Shichau zo is the type of manga you want to read.

[img]https://i.imgur.com/6MBFpsv.png[/img]
ᵂᵃʳᵘᶦ ᴷᵒᵗᵒ ˢʰᶦᵗᵃᶦ ᴳᵘᶦᵈᵉ | ᴳᵉⁿᵉʳᵃˡ ᶦⁿᶠᵒ | ᵂᵃʳᵘᶦⁿᵉˢˢ

Here are a few ideas: (Sorry, I don't know how to make the titles link to their listings yet, I'm new to the forums)

Ai Subeki Sadist - Uke is quiet and shy, hiding his broken-ness and past hurts, and using sex to find oblivion and the touch he needs. When he has sex he becomes aggressive and wild. Eventually, Seme helps him heal his baggage and he becomes less aggressive and more sweet in bed over time. (I'm giving you a description because the listing doesn't have one yet...)

Secret XXX - Very sweet gentle seme who raises bunnies for a living becomes very aggressive between the sheets

Gosan no Heart - Selfish and promiscuous uke has been a wild womanizer until he finds his seme and then becomes a trembling sweet ball of putty in seme's hands

Moon and Sun (ABE Akane) - the Uke is a wild delinquent until he is tamed by the strong but feminine seme - not exactly within your mentioned parameters but similar

Those are the only ones I can think of right now, but I know i've read so many that would qualify, so if I think of more I'll add them.

🙂