3화: 강가에서 달리는 도중 쓰러진 모브를 보고 의문의 가면 여성이 다가온다
2016년 7월 25일 방영
It's great that Mob joined the Body Improvement Club, but he suddenly faints as he's running along the riverside. His wish is to get stronger and to be able to get closer to his beloved Tsubomi-chan. One day, as Mob is feeling troubled, a woman with a strange mask approaches him... Progress toward Mob's explosion: 20% (Source: Crunchyroll)