18+ Mai Ball!

Mai has been helping out her childhood friend, Kunimitsu, every morning with soccer practice ever since they were little. After years of practice, Kunimitsu has been MVP for 2 years in a row at the middle school nationals. One day, Reika—one of Kunimitsu's admirers—witnesses the two childhood friends practicing, and is shocked by Mai's ability to keep up. Determined to prove herself to Kunimitsu, Reika challenges Mai to a soccer challenge!

Caught between her childhood crush and new competition, will Mai be able to hold her composure? With a tendency to get too nervous or fantasize about Kunimitsu, Mai has a hard time playing soccer outside of practice. Can she stop her lewd fantasies long enough to beat Reika?

(Source: MangaHelpers)