Attack! Goshogawara

(from ebookjapan):

Goshogawara Kaku is the only member of the traditional Musashiyama High School Sumo Club. However, in order to qualify for the team competition, they need five wrestlers...

The helpers Goshogawara has gathered are all extraordinary people. They face the turbulent ring with their spirits and strange strategies! A youthful sports manga full of laughter and excitement!