Hanayome wo Ryakudatsu Sareta Ore wa, Tada Heion ni Kurashitai (Associated Names)

On the day of the wedding, a stranger broke in. He came to steal my fiance. He starts proposing to her with a toy ring. Ha? He promised to marry each other when they were young. And I was flustered without a moment’s hesitation. My fiancee’s sister appeared in front of me exhausted from being…