Yuujou Kyoutei no Kaijo Houhou

Tomo and Yuu have been together since grade school, but has that relationship matured along with them, now that they're adults? As she sees how much taller he's grown, his big muscles, and the size of his hand on her skin, Tomo starts to see Yuu as a "man." But he seems to be acting strangely... "Like," "like-like," "love." Where's the line between friends and lovers...?