Kurasu de 2-banme ni Kawaii Boyish Osananajimi wo, Ninpaku Sanka no Shuugakuryokou de Netotte Tanezuke Sex Tsuke ni Suru Hanashi

It's not really cheating, when I had the power to seduce my childhood friend, whom I love. I wanted to get my hands on my tomboyish childhood friend, Aya Minatori, no matter what, even if she already had a boyfriend. During our three-day, two-night school trip, guided by the voice of God (?), I pleasured Aya, took her virginity, came inside her, and transformed her, body and soul, into someone that could never go back to her boyfriend!

(Source: Frances Shoin, translated)