Steins;Gate 0: Kesshou Takei no Valentine - Bittersweet Day

Sinopsis

Unaired episode included with the volume 6 BD/DVD release of Steins;Gate 0. A special day approaches during a lull in the chaos. It's that time of year to give chocolate to the ones you love, but not everyone finds that an easy task. With Valentine's Day just around the corner, the girls of the Future Gadget Lab discover that Kagari has never celebrated the occasion before! Determined to make this year's holiday the best one yet, they all set out to make delicious homemade chocolates together. However, with many of their quirks causing kitchen disasters, this may prove to be too hard a task. Will their feelings ever reach those of their heart's desire?

Trailer