Sasaki, an overworked salaryman, goes through an average stressful day just for a single light at the end of the tunnel: Yamada, the always-cheerful clerk at his favorite convenience store. One day, Sasaki t...

I love math. Just after the high-school entrance ceremony, I meet a beautiful girl: Milka. Milka is a mathematical genius. She shows me many math and many elegant solutions. Milka and I spend a long time dis...