My Missing Half is Who?

Len Kagamine is mentally ill after suffering loss and doesn't have the capability of fending for himself, so he is taken care of by the older brother figure Kaito Shion and his friends Miku Hatsune, Meiko, Luka Megurine, and others. Len will have to pull himself out of insanity with little to no help and find his other true half by himself, all in just one lifetime.

[ Shounenai, soft boy x boy. Possible shoujoai, soft girl x girl, and heterosexual pairings as well. ]