Steins;Gate 0: Valentine's of Crystal Polymorphism -Bittersweet Intermedio-

Steins;Gate 0: Valentine's of Crystal Polymorphism -Bittersweet Intermedio- was released in 2019 as a special OVA episode bundled with the Blu-ray box set of the Steins;Gate 0 anime series. Produced by the studio WHITE FOX, the episode serves as an additional chapter within the branching narrative of the series, which itself is based on the visual novel developed by 5pb. and Nitroplus. The story centers on the protagonist Okabe Rintarou and the supporting cast as they navigate the complexities of Valentine’s Day through the lens of their unique, time-traversing science fiction framework.

The episode is noted for its tonal departure from the heavier, more melancholic themes of the main Steins;Gate 0 story, opting for a lighter, character-focused approach that emphasizes the interpersonal dynamics between the Lab Members. By revisiting the iconic characters in a low-stakes, holiday-themed setting, the creators aimed to provide fans with a sense of closure and levity after the emotionally demanding narrative of the series. While intended as a niche supplement for dedicated enthusiasts of the franchise, the episode is recognized for maintaining the visual consistency and voice-acting standards established by the primary adaptation.