College student Souran visited his girlfriend Emimi's house for the first time. There, he was introduced to her sister Kaede, who was cute and free-spirited, with her bare breasts occasionally visible through gaps in her clothing. Her body, larger than his girlfriend's, was unconsciously displayed, causing him to become fully erect. Noticing his excitement, the mischievous sister began to seduce him with her G-cup breasts. 'They're bigger than my sister's... Will you fall for me?' Beyond his limit of endurance, Souran gave in to his desires and had sex with her every day. A worthless boyfriend driven by taboo lust.
