7 days with sister

You play as an older brother, your parents are divorced. A few years later, your father dies in a car accident and all his inheritance remains with you. You move into your father's house and start a new life. Your mother, having learned about your father's death, finds herself a new husband, one day he drank too much and tried to rape your sister. She runs away from home and decides to find you - you are her last hope.  
The only problem is that you are a talentless hikkamori.

Will you be able to get along with your younger sister? 
Will you make her happy or will you give in to your lust?

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