
Quick answer — Kotoko performed 5 anime themes, including "Loop-the-Loop" from Motto To Love Ru, "Shooting Star" from Please☆Teacher!, "Katachi ni Dekinai Monologue" from Aru Asa Dummy Head Mic ni Natteita Ore-kun no Jinsei.
Kotoko performed the anime theme songs "Loop-the-Loop" (Motto To Love Ru), "Shooting Star" (Please☆Teacher!), "Katachi ni Dekinai Monologue" (Aru Asa Dummy Head Mic ni Natteita Ore-kun no Jinsei), "Tough Intention" (ARGEVOLLEN), "ZoNE-iT" (ARGEVOLLEN).
Kotoko's first listed anime theme is "Loop-the-Loop", the opening of Motto To Love Ru.