Inukai Seriho is a 25-year-old lady who is owner of the Amber Teahouse, a small tea shop she opened in Tokyo after winning a lottery.

Although skilled in creating tea, she has trouble managing her shop, shown when she forgets to take down the "Closed" sign on the building.

She takes on one of her regulars, Sarasa Kotoori, to work with her in the shop, and slowly begins falling for the younger girl.

Has a short cameo appearance in chapter 2 of Kotonoha no Miko to Kotodama no Mahou to. Also appears in chapter 1 of Iono-sama Fanatics when Eto and Iono meet at the Amber Teahouse.

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