Omoikkiri Detective Team Hardgumi S01 E26 Messenger from Space

Susumu encounters a flying saucer on her way to the Hakuan's hideout. However, none of his friends believe Susumu's story. Susumu is disappointed, but when he tries to sleep that night, an alien appears in his room. The alien came to Earth to sell "Diamond Flower Seeds" to Matenro. However, Susumu ate the precious seeds.