Pictured is the Japanese striped snake at the Asahiyama Zoo, Asahikawa, Hokkaido. Asahikawa is Kawaragi Momoka's hometown, and she's very scared of snakes, so this image is a double reference.

Pictured on 2023-01-05

Bonus information board: asset #22943747

Bonus fact: this zoo is also featured in Lonely Girl ni Sakaraenai

43° 46′ 4″ N, 142° 28′ 38″ E