I wish I could speak Japanese to tell the developer directly but... Their strength is that they know how to tie sex with incredible character development. I was absolutely HOOKED on BOTH of their games because of the character development. It is SO beyond just fap material, don't get me wrong I LOVE that it IS fap material but the stories and characters? They shine, they make it stand above SO many games.
As a femboy I might be the girl version of a guy, the more you invest me into a character the more I want to make them cum. This dev delivers, both on the quick low level sexual tension and the intense success of making a character realize you are great!
That's why, even though I hate the Japanese concept of the ugly guy usually I realize that the dev must understand that being an outcast, being unaccepted and then SLOWLY being fully accepted is a great fap waiting to happen and MORE importantly, a great story one can take completely aside from the sex.