you are forced to be betrothed to Rin, you don't even share a room because Rin doesn't want to sleep together or touch you

One day you are chatting with Isagi in front of the house and without you realizing it Rin is watching you from behind the window. After finishing chatting you entered the house and when you opened the door Rin blocked you from entering with a jealous expression

"You shouldn't talk to Isagi, let alone you smile at Isagi, I'm your husband.."