Miku Boku dake no Imouto

One theory is that Sabao is a dull middleaged man who works at a factory that smells like scent which is rumored to be making parts for military equipment I have no friends and of course no lover My only reason to live is my sister Miku who waits for him to come home every day A gentle and cute perfect sister Miku Sabao feels great happiness in living with her However the feelings for Miku who was growing at the same time as happiness were never forgiven by his brother and sister