User blog comment:Mizuki Raimon/What do you think they're gonna be doing 10 years later?/@comment-2235609-20110723171456/@comment-4061707-20110724211334

Endou's son/daughter (no clue which yet) probably married someone with greenish hair, thus Kanon looks different. If Endou and Natsumi had children they would probably have brownish red hair.