Mahjong Soul Pon☆Cup is a single web-only special, released ahead of the Jongtama PONG☆ TV anime and made as an extra episode for that series. It brings in two VTubers, Tsukasa Tenkai and Ito Life, alongside the professional mahjong player Takaharu Ooi. A comedy built around the game of mahjong, it serves as a short companion piece to the main show.