I don't really Know any other game and just thought it to be like a etra tentacel that hypnotises her with some bonis and making you be able to do more cracy stuff with her cause like her last resistanc breaks.
And i don't know how far you want that game to go but thought that you could Also let go kidnap other girls and let her make money through bitching (not that i know why tenttacels would need money) and just make her your miniion , for.... I don't know. Worlddomination?