Unbreakable Machine-Doll

Raishin and Yaya arriving at (or heading toward) the academy (school).

The setting is an outdoor hot spring / open‑air bath where several characters are present. Irori (one of Yaya’s rivals among the Banned Dolls) is central to what goes wrong.

The episode centers on Charlotte (“Charl”) and Frey, placing them in a bathroom setting with a twist of “horror” or “terror” (in a light, comedic sense).

Nadeshiko Akabane in a dreamlike or idyllic midsummer‑night setting, possibly with some magical or romantic undertones (“dream” in the title suggests a fantasy sequence).

Because it’s a “private lesson,” there may be a situation where someone needs help (wound, training, incapacitated), and another character gives advice or helps. But in typical OVA fashion, there’s also comedic or fanservice undertones (aw…

The female cast (the “pretty girls” — likely Yaya, Charlotte, Frey, Irori, possibly Henriette, Komurasaki, etc.) gather together at a pool, beach, or other swim setting.