Rikei ga Koi ni Ochita no de Shoumei shitemita. Heart Online

Rikei ga Koi ni Ochita no de Shoumei shitemita. Heart

Science Fell in Love, So I Tried to Prove It 2nd Season, Rikekoi, Rikei ga Koi ni Ochita no de Shoumei shitemita. r=1-sinθ, 理系が恋に落ちたので証明してみた。r=1-sinθ(ハート) HD
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