Aria the Origination

Synopsis

Akari and Aika secretly observe Alice during her first day as a Prima, and when Alice asks how she was, Aika says she looked as stiff as a toy robot. To cheer Alice up, Akari invites her over for autumn moon-gazing. That night, Akari introduces her friends to Japanese Tsukimi customs, and Alice thanks her for helping her relax. When Al runs late, Alice teases Aika about inviting him, and Aika goes off flustered to find him. After they meet, Aika falls into a dry well, and when Al tries to pull her up he is pulled down instead, trapping them both. They are found by Maa, whom they send back to Alice for help. While waiting for rescue, they talk about Aqua's two moons, gravitation, and attraction, and it becomes apparent they are both attracted to each other. Akari and Alice eventually rescue them, and as they walk back to Aria Company, Al takes Aika's hand.

(Source: Wikipedia)