I am trying to find a Yaoi manga

Look, it's been a long time since I read this and I forgot most of the details so work with me, please:

So like, Boy A has a crazy mom who is obsessed with keeping him near her at all times (she got issues, man). There's Boy B who is haunted by this woman who was his neighbor and was being abused by her boyfriend or whoever, and I think she was murdered (or it was implied). Boy B is thinking about leaving town, and he asks Boy A to come with him. Boy A lies to his mom and says it's some sort of trip for school (?), so then the two boys run off together and take the train to the beach, where they meet and hang out with these girls and while they're there they starting falling in love or whatever. When they get back, the crazy ass mom tries to strangle her son (he lives, though, and it's a happy ending).