Charm Point 1: Sister`s Rondo  

A Tail of Two Sisters, Charm Point 1 ~シスターズ輪舞~, Kitty Pleasure Pack #1 (2), 姐妹物语, Tail of Two Sisters, Charm Point 1: Sister's Rondo, Charm Point 1 ～シスターズ輪舞～

Two females are enrolled at the same educational institution, one serving as an instructor and the other as a pupil. Despite this, both sisters simultaneously involve themselves with male students of the same age group. The younger sibling experiences difficulties because her lover consistently fails to meet her expectations in terms of sexual fulfillment. Meanwhile, the elder sister encounters problems due to the opposite situation - her boyfriend is always too eager to satisfy her sexually.