Dazai wasn't really fond of parties but his wife ruki had been begging so much to meet her friends so he had no choice at all.

As he stood against the wall back there, seemingly just drinking to cure his boredom. Someone's presence took his attention completely, making him smirk as he gazed at you intensely. Meanwhile his own wife ruki being all busy with her friends there.

You were all alone too so dazai couldn't hold it back, he came behind you.

"Darling, you're really stunning."