Aki Sora Episode 4 — Verified

, a similarly themed anime that does have 12 episodes. In that series:

This highlights the tragedy of his character: he is sought after by others (Kana, and hints of Runa), yet he is emotionally tethered to his sister in a way that isolates him from the rest of the world. The episode subtly reinforces his loneliness; even when being intimate or helpful with others, his mind is elsewhere. aki sora episode 4

A 12-episode series where Episode 4 , "Haruka's Heart," focuses on the Kazuha route. , a similarly themed anime that does have 12 episodes