Kanojo ga Senpai ni Netorareta node, Senpai no Kanojo wo Netorimasu

Also known as: 彼女が先輩にＮＴＲれたので、先輩の彼女をＮＴＲます, Kanojo ga Senpai ni NTR-reta node, Senpai no Kanojo wo NTR-masu, 彼女が先輩にNTRれたので、先輩の彼女をNTRます, แผน NTR แฟนรุ่นพี่ แค้นนี้ต้องชำระ, 因为女朋友被前辈NTR了，所以我也要NTR前辈的女朋友, My Girlfriend Cheated on Me With a Senior, so I’m Cheating on Her With His Girlfriend

by Mihiro Shinden

Yuu Isshiki, a first-year college student, has a charming girlfriend, Karen Mitsumoto. However, one day Yuu discovers that Karen has an adventure with her Senpai, Kamokura Tetsuya. Angry, sad and desperate, he calls Kamokura's girlfriend, Sakurajima Touko, from which she is said that she is the most beautiful girl in the institute. "Touko-senpai. Please, have an adventure with me. " But Touko said: "I can not let me fool me. I have to push my opponent at the bottom of despair. " Her's plan is then to continue falling in love and, finally, to break it as the night with another man.