Summer Love Begins with a Lie

Kaoru, who ran away from home, is found drenched in the rain, by her homeroom teacher, Mirei. At school, Mirei seems like a responsible adult, but at home, she's a sloppy daydrinker, chatting away with a grin on her face. But she helps Kaoru come to grips with the troubles she's been unable to face... It's the beginning of an unsteady romance between two people who haven't matured to adulthood.