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

One year after the events of the anime, Rintarou begins to feel the repercussions of extensive time travel, and eventually completely fades from reality. Kurisu, being the only companion to remember him, now must find a way to bring him back.

While struggling to make friends after his parents’ divorce, Koyomi Takasaki meets Kazune Takigawa, but apparently, they already have. Kazune reveals that she’s from World Line 85, an alternate universe in which she and Koyomi are lovers. But in a reality where moving between dimensions is natural, could Koyomi be the one from another world?

Koyomi Hidaka and Shiori Sato meet at his father’s research center and begin to fall in love, but so do their parents, who eventually marry. To avoid becoming stepsiblings, they decide to run away to a parallel universe. Traveling between dimensions is common in their world, but not without repercussions. Does a universe exist for the young couple, and what will it cost them to find it?

Shin-chan is approached by his time-traveling future bride-to-be Tamiko, who asks him to help save his adult self from the ruler of Neo Tokio.

A shy high schooler in Kyoto meets a man claiming to be his future self, who tells him he’s hacked into the past to save their first love.

Plagued by a seemingly endless stream of haunting dreams, Tomoya drifts through life with an almost overwhelming sense of anger and emptiness. Then, one fateful day, he meets the mysterious and beautiful Nagisa, and his world begins to change. While helping Nagisa revive the defunct Drama Club at their high school, Tomoya discovers that she has the same dreams. Their story starts beneath the cherry blossoms, but where will fate lead them?

It is 2046 when a mysterious alien force begins their annihilation of the human race. Leaving behind the one person she loves, Mikako joins the interstellar battle as a pilot. And so - while Mikako risks her life to save mankind - Noboru waits. The two lovers, worlds apart, desperately strive to remain connected as the gap between them widens at a frightening pace.

Doraemon and his friends travel to ancient Japan where they meet Kukuru. When Kukuru tells them that his tribe has been enslaved by Gigazombie, Doraemon decides to help him.