Quick answer — Ayahi Takagaki performed 2 anime themes, including "Kimi ga Iru Basho" from Occult Academy, "Shiokaze no Harmony" from Tari Tari.
Ayahi Takagaki performed the anime theme songs "Kimi ga Iru Basho" (Occult Academy), "Shiokaze no Harmony" (Tari Tari).
Ayahi Takagaki's first listed anime theme is "Kimi ga Iru Basho", the ending of Occult Academy.
