Aneki... My Sweet Elder Sister The Animation  

あねき… MY SWEET ELDER SISTER THE ANIMATION

Here's an alternative version of your text with similar meaning but different wording: Saki-senpai has caught Takumi's attention due to her captivating figure, which stands out wherever she goes. One day on a train ride, they strike up a conversation and become friends. From then on, Takumi can't help but admire her body and gets excited whenever he sees it. The following day, he discovers that they share the same sexual preference, marking the beginning of their relationship.