Its almost a "we want the original couple to cameo, but we don't want to make up new characters" NocturnalGreyhound
Exactly. Just look at the "I Want To Be Naughty" series. She'll introduce a new character as an antagonist in the main series and then give them a spin-off where they're the romantic lead.
I want to see Michan and his girlfriend together!!! Turn it into a shoujo manga!!!!!!!!