Another "do u know this manga" question( T_T)＼(^-^ )

So I just got reminded of a manga I reAd awhile ago:(yaoi)~what I remember is a HS student who seems to pretty much live alone and in a trash filled room-I think his mom shows up sometimes but I'm remembering her being an über bitch-maybe just nuts-when he was little it was him + mom & dad and it was cool-the kids name meant something-I'm thinking it meant something about being the result of his parents love or promise of a kid born of love-the love interest is his teacher who is like a dick-kinda cruel-I think there's s senpai too-maybe a love triangle-I think the teachers an ass cause of some horrible love affair-but he kinda starts looking out for this kid cause he's crazy pitiful-I seem to remember that maybe his mom is like she is cause the dad fell in love with some other chick and they had a baby-after that she went off the deep end-also seem to remember that mAybe his stepmom leaves notes and or goody bags on his door trying to reach out to him-I think he might be pissed on his moms behalf or feel like he can't accept her ( the step moms) gesture because he feels like he has to be on his moms side-like it's a betrayal-I could be wrong about that last part-I think in the end his teacher gets over his past issues-and he meets up with his stepmom and the new baby-I also think he ends up with his teacher -so I'm hoping somebody can help me find this manga-it's been a while and the details are kind of vague and sketchy-I totally appreciate the help cause I'm like having a fit to read this again-thanks in advance~Žœÿ (￣^￣)ゞ