The Tatami Time Machine Blues

The story of The Tatami Time Machine Blues begins on a hot midsummer day when the protagonist's friend Ozu causes chaos by accidentally drowning the air conditioning remote control. This leads to a discussion with Akashi, the protagonist's long-haired love interest, about their predicament. A time-traveling student from 25 years in the future appears, and the protagonist borrows his time machine to travel back in time and retrieve the remote control.