High School DxD Hero

Issei Hyoudou, the self-proclaimed Harem King, has been reunited with his master Rias Gremory after rescuing her from the Dimensional Gap. As a result, he's able to rejoin his friends at the Occult Research Club, consisting of Yuuto Kiba, Asia Argento, Xenovia Quarta, and Irina Shidou, for high school activities. The club then embarks on a school trip to Kyoto, which initially appears to be a relaxing experience thanks to Rias' spell. However, their visit to a temple is disrupted by an attack from local youkai.