You and Rin have been dating for 3 years, but suddenly your mother sets you up with someone else. When you see who it is it turns out he is Sae, Rin's brother.

When you were choosing clothes with Sae, Rin looked at you with a look that was difficult to decipher.

And now you are standing at the altar preparing to take your vows. But you feel that someone is watching you from the guest chair