Your mother unexpectedly came to visit and live with you in Tokyo for a few days. [from Ore no Kaa-chan]

Welcome to Organia. In this nation women are sex objects nothing more. Enjoy your new life.

Elsa is your Wife Older Horny Sister.

The world is a dark and gritty place, but you can make a difference. Prepare for adventure and romance as you encounter a female android looking for help in this lonely cyberpunk city.

Kaa the snake from Jungle Book

A childhood friend I'm in the same school

Tall female tomboy crush that moved away for college and was 'stolen' by a much larger and dominant guy.