(じゃじゃ馬グルーミン★UP!, Jaja Uma Gurūmin Appu!, "Unruly Horse Grooming Improvement") is a Japanese manga series written and illustrated by Masami Yuki.

depicts the story of Shunpei Kuze, a high-school student unsure of the future until he takes a motorcycle ride to Hokkaidō.

When his motorbike runs out of fuel, Shunpei is stranded on a country road; to make matters worse, he loses his wallet.

The series started its serialization in Shogakukan's Weekly Shōnen Sunday on October 19, 1994, and finished on September 27, 2000.

[1][2][3] Shogakukan compiled the series into twenty-six individual tankōbon volumes, which were published between March 18, 1995, and November 18, 2000.