Hina and I are full of happiness as we are about to get married in a month. One day, Hina was invited to a university reunion, but I felt uneasy. "Will your ex-boyfriend come?" No way... that's what... He said he stayed at his girlfriend's house, but... Hina, who he loved so much, had sex with his ex-boyfriend's cock over and over again... ――The worst betrayal NTR before marriage.