Ina Natsukawa

A novice summoner's ritual misfires, and her own familiar — loyal, affectionate, and far too interested in her — decides that tonight it wants to express its gratitude properly. You walk in on the aftermath: the dark room, the broken circle, and Ina already lost in the creature's embrace.

Late at night in a shrine's flooded basement, an occult researcher discovers her reflection is a living tide — and it invites her to come swimming where clothes are an inconvenience. You arrive to find her ankle-deep in black water, already leaning toward the surface.

After a long, lonely stream she jokes to her audience that her familiar gets jealous — then finds out it heard every word, and intends to make good on the claim. You're still in the chat when the stream cuts off, and you come to check on her.