I already totally forgot who is that character... the owner of the room. can anyone kindly...

Akira's boyfriend Naoya :)

He is Akira's lover. Oh maybe I should said sex-friend.

akira's seme, shimakawa naoya. he is a med student in the same college as akira and nemu.

Good ans! But second question...why is Akira?? XD

Excuse me, I mean, 'who' not 'why'

Akira is Maya's cousin who also was a tutor of Maya mad nemu in their highschool

*was the tutor of Maya and nemu when they were in highschool

Nope, with the complete Akira-arc
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You definitely have to call him his boyfriend ε=ε=(ノ≧∇≦)ノ

HAHAHAHA THANK YOU FOR ASKING TOO!

Thank you!

I'll just reread it again till to the part that i can finally remember to fully grasp it again. Thanks minna!