義理の妹と結婚します (Series) favorite_border

[DeepL Translation - needs review] My father remarried. I had a sister-in-law. I fell in love at first sight. So I, Takuro Matsubara, declared at our first meeting. I will look at her - Toko Konoe - with a sexual eye. But for some reason, my sister-in-law's first impression of me was terrible, and my roommate life started with a -∞ rating. And I'm a bit of a prissy little thing... What is "a little" about me? I push her down, touch her breasts, and look at her underwear every day! I'm sorry,...