MXGS-1187 Madoka Shizuki was seduced by my super masochist step-sister who suddenly got married after my parents remarried.

I got a sister-in-law because of my father's remarriage. - The incident happened when my parents were on their honeymoon. - When I saw my sister sleeping on her way home that morning, I couldn't resist touching her body. - Then suddenly she asked me out! - She was actually a masochistic and lewd older sister.