Osananajimi to Namaiki Gimai -Bloomer to Mizugi no Yuuwaku | 幼馴染と生意気義妹 ～ブルマと水着の誘惑～

In this world, choices abound. Right or left, front or back. Big breasts or small breasts. We are constantly forced to make such choices.

"Jun Kurami" was confessed to by his childhood friend and his stepsister. He, who is extremely indecisive, couldn't choose which one to date.

Therefore, the two women schemed to win Jun over using every trick in the book.