The Wallflower Vol. 26 (manga)
SUNAKO OF THES SCIENCE ROOM
The pressure is mountig on Kyouhei and the boys to turn Sunako into a lady, in order to get their rent for free! But when they find out that Sunako has been spending a lot of time in the science room with a mysterious sensei, Kyouhei must decide what he wants more: free rent or love?