30 Days ~ Life with My Sister ^v1.0

The protagonist, who has been living alone in his parents' apartment for a year, suddenly receives a phone call from his parents with unexpected news. His younger sister has decided to attend school in town, and since you don't pay rent and have an extra room anyway, he is told to let her live with him without complaint. It is a good thing for the protagonist to be able to live under the same roof with his favorite sister, isn't it?
Spoiler: StoryHowever, a few months after the arrival of his sister, he finds himself masturbating in her panties, and the situation suddenly changes. The protagonist's love for his sister goes beyond that of his siblings and is a bit too intimate. She used to adore him very much, but now she is angry with him. How can he repair the relationship with a month to go until she returns home?
The game starts after this event. You will have to deal with your sister in various situations in your daily life, make the right choices, and try to repair the bond with her within the time limit of one month. Perhaps now that you have been caught using your sister as a plaything and there is a strange tension in the air, you may be able to build a better relationship with her than ever before...

Game is avaialble for Windows