Yojouhan Time Machine Blues unfolds on a stifling midsummer day when Ozu, the protagonist's "terrible friend," accidentally submerges the sole remote control for their apartment's air conditioning unit. As they debate their dilemma with Akashi, the protagonist's raven-haired love interest, a disheveled time-traveling student arrives from 25 years in the future, leading the protagonist to borrow his time machine in an attempt to retrieve the remote from the past before it breaks.