If you're looking for anime similar to 21 Emon, you might like these titles.
Music video for Eiichi Ohtaki's song Kimi wa Tennenshoku, celebrating its 40th year anniversary.
The story revolves around Makoto Yukami, a high school boy whose hobby is visiting hot springs. His 100th hot spring visit is at Miyama-kan, an inn run by four "poster girls": Tokura, Akino, Tsutsuji and Mitomo. There, Yukami spies Yuri, a goddess of the hot springs, and unexpectedly usurps her powers. Makoto ends up working at the inn.
Protagonist Eiji assembles "cunninglasses" so he can read his classmate's note about the boy she likes.
Maise Higa, a listless first-year high school girl who works part-time at the front desk of her family's hotel in Okinawa, meets "Ichirou Suzuki," a mysterious youth who came alone from Tokyo as a hotel guest. Since Suzuki's arrival, "dëji" things have been happening around Maise, like fish swimming around the room or a giant banyan tree smashing through the hotel ceiling.
Minori, an office worker and her boss Hadano, are constantly arguing with each other. One night, after a company drinking party, Minori and Hatano are having their usual argument, when Minori realizes that she missed the last train. They decide to spend the night at a nearby capsule hotel, but an incident forces them to share the same unit.