School ghost story!! Part ghost out during the day?

Kiteretsu Encyclopedia · Episode 122 · “School ghost story!! Part ghost out during the day?”

The main character is a scientific genius boy named Kiteretsu, who has built a companion robot named Korosuke. He frequently travels in time with his friends and Korosuke in the time machine he built. Miyoko is a girl in his neighborhood who is basically his girlfriend. Tongari is his rival, who...