That's real Hitomi not Mrs.Yamada. But only one time because she wants to get back at his boyfriend. Momoko disguises herself as her niece to keep an eye on Masuo during college.
Well he is not good friends with him like he is with Luna. But now that he is part of his team (as Ted is working under Rebecca and Regina) he will control his urges for anyone he calls friend. He sleeps with Luna because he has doubt that he doesn't really love her which is confirmed after getting Wendy as truck assistant. Len will be datable character. Michelle isn't interesting character for me to include in Magic Ring so had that cousin's warning excuse. Same with Wendy, she will not appear in that game. Her sister will though because Wendy dies because Mason after Mandy tricks him into giving her some stuff.
You get more petals from loyal to their partners no matter what. Megumi is off limits but Nadeko will offer her doll to him to make his ring stronger.