Otaku chishiki zero no ore ga, naze ka otokogiraina gyaru to ota katsu o tanoshimu koto ni natta ndaga (Associated Names)

Out of a sudden, I had a crush on my classmate Takase Narumi. My ideal school life is to become good friends with her and together with my twin sister, Kotomi, who is also a classmate of ours so that both siblings of us could enjoy the rosary teenage together. However, the problem would be…