NTR Sisters ~ Mia and Yumi

Synopsis

The protagonist, college student Yasutaka Eda, had a bitter memory. When he went to the apartment of his girlfriend, Yumi Shibasawa, he walked in on her embracing a stranger. However, Yumi made no attempt to hide it; she continued to have sex with the man right in front of him, explaining that she wasn’t satisfied with him alone. Their relationship came to an end, and Yumi disappeared from campus. The shock of that incident lingered and he convinced himself he could never have a girlfriend again.

Later, he reunited with Yumi’s younger sister, Mia Shibasawa. He gradually grew attracted to her, and they began dating, but the trauma Yumi had caused Yasutaka lingered, affecting his sex life. However, as Mia stood by Yasutaka’s side, his wounds finally began to heal.

Some time later, Yumi reappeared before Yasutaka. Yasutaka told her that his current girlfriend was her sister, Mia, and Yumi didn’t object. He thought he could put the past behind him and live happily with Mia from then on. However, Fuma Saginuma—the man who had once made love to Yumi right in front of him—began to drag not only Yumi but also Mia, who was supposed to love only Yasutaka, into a world of sexual desire.