Spin-off of Yojouhan Shinwa Taikei. It is August 12th. After the remote control to his boarding house's only air conditioning unit is inadvertently destroyed by spilled cola, "I" devises a plan to return to yesterday in a time machine to recover the remote before it breaks. However, his friend Ozu cannot resist playing with past events, even when it means bringing the universe to the brink of destruction. Now "I" finds himself racing through time to avoid disaster.