https://www.dlsite.com/maniax/work/=/product_id/RJ01401017.html Due to his parents’ sudden trip abroad, the protagonist has to live alone with his rebellious younger sister for a month. One night, he peeks into his sister’s room and finds her struggling to masturbate for the first time. As a brother, he decides to develop his sister’s body in the middle of the night in order to release her sexual desire. The naughty 30 days with his sister begins!    ## Want to read untranslated visual novels in English? ## [You can try use my UBTL tool to translate the game as you play (click here)](https://www.patreon.com/posts/ubtl-v2-patreon-139844217) ## Join our Server to get updated versions and similar tools and projects over: ## https://discord.nexus34.xyz