Summer Time Machine Blues

Samâ taimu mashin burûsu is a movie starring Eita Nagayama, Yoshiaki Yoza, and Daijiro Kawaoka. A sci-fi club concocts a plan to repair a remote by using a time machine that suddenly appears.
The members of a sci-fi club accidentally spill Coke on the remote controller of an air-conditioner during summer and suddenly a time machine appears in their sweating bath-like clubroom.