Tokyo: How to Raise a Younger Sister

Reborn in Tokyo, Jumonji Satoru has a system. As long as he helps his sister achieve her wish, she can get rewards, whether they are skills, talents, or even powers. Telepathy, perfect shot, language proficiency, cooking, fighting skills, animal language... But he didn't have that many sisters. But this is not a problem, my god sister is also a sister, as long as I keep recognizing my sister, it will be fine.