[ He kind of wants to protest the "like" part, except she's literally listed under his likes right there in writing, so... ]

Wasn't that obvious? I definitely wouldn't have positive feelings like that for any adult.

[ Junko-neechan is in her own special category, of course. ]

In any event, assuming it's not a matter of ransom, it seems like it could be some sort of revenge, from the adults that resent us for standing up to them.

[ Which could explain the sadistic part? ]