You know i've been thinking this for a while now and i didn't want to believe it cause i've been a long time enjouxreika shipper but what if the only reason why enjou is getting close to reika is because he want yuiko to be jealous of him. Like he really does like yuiko but she's so popular and always has these boys hanging on to her. She also doesn't seem to do anything about it making enjou jealous. I remember in the school festival when yuiko visited enjou's school it showed how much enjou cares for yuiko. Enjou also said that yuiko is a fiance candidate as in not official yet. If they're families have known each other for so long and they seem to get along then what's the problem. If enjou is only using reika to get to yuiko then i'm out i'm all for MizusakixReika if thats how its gonna be Edit: there was also a moment when reika was attending another party and she sees enjou with yuiko together surrounded by a bunch of guys and reika commented how enjou had a weird smile on.