"Huh? Is cheating caused by having a big dick?" asked Yuzumi Haisui when consulted about her husband's philandering problem that persists even after marriage and seems to be getting worse. She couldn't help but laugh at the unexpected reason given for his infidelity. "Well, if that's the case, why don't you show off your bragging rights cock?" she challenges him, already fed up with his lame excuses. Little did she know, her taunt would lead to something far beyond her wildest imagination - a massive member revealing itself before her eyes! Mesmerized by its impressive size, Yuzumi finds herself unable to resist satisfying her desires with this unexpected gift.

「は？浮気の原因がデカチン？」結婚しても治らないどころか悪化の一途を辿っている旦那の浮気癖を相談された和泉は予想外の浮気原因に脱力してしまう。そんなわけないだろう。いい加減すぎる言い訳に怒り心頭になった和泉。「ならそのご自慢の浮気チンポを見せてもらおうじゃないの」どうせその場しのぎのウソに決まっている。馬鹿にしてやるつもりでほくそ笑んでいた和泉の前に飛び出してきたのは、予想を遥かに超える巨根砲だった。黒光りする立派なイチモツに心奪われた和泉は、欲求不満を晴らそうと画策していく。