Xebec

Xebec (株式会社ジーベック) was a Japanese animation studio based in Kokubunji, Tokyo, founded by former Tatsunoko Production animators on May 1, 1995. They have worked on many popular series like To Love-Ru, Kidou Senkan Nadesico, Love Hina, Haiyore! Nyaruko-san, Shuffle! or Yuragi-sou no Yuuna-san.

On November 20, 2018, Xebec’s parent company, IG Port, sold the studio to Sunrise after constant deficits that the subsidiary had in different years.

On March 5, 2019, Sunrise announced that they established a new company, Sunrise Beyond, at Xebec’s address, with Xebec’s operations being transferred to it.
*wikipedia

After certain events in the past, Sado Tarou becomes a masochist. He realizes that he has a problem. Therefore, in high school, he decides to go to the school's volunteer club for selfless help in search of understanding. There he meets the beautiful Isurugi Mio, who sets her sights on curing Tarou of his masochism.
As a child, Urashima Keitarou promised his friend that they would meet again while studying at Tokyo University. Unfortunately, the boy fails the qualifying exam. However, he doesn't give up and decides to devote the next year of his life to preparing decently for the next enrollment.