Tenohira no Akira-kun

Tenohira no Akira-kun summary:

Shiori is an office worker who has been feeling terrible ever since her breakup with her boyfriend. She's been trying to forget him but she found herself unable to move forward just yet and now she urgently needs some healing! That's when a palm-sized high school boy named Akira appeared before her. And he seems to be at a loss about his mysterious condition too. He's like a small animal and he doesn't give off the vibe of a boy... How great! and that's how they started living together but even though Akira-kun is small, he's still a boy so...!?