On the final day of summer vacation, Kokona Aoba is ready to spend some long-awaited time with her mother, but these plans are unfortunately canceled due to work. Opting to go outside instead, she takes a stroll down a familiar path—one where fond memories appear at every corner. Later, in the middle of autumn, Hinata Kuraue and Aoi Yukimura are looking through a scrapbook of their childhood. Snooping around in Aoi's room, Hinata finds that she has kept a strange acorn as a keepsake, but doesn't remember the reason why. As its discovery dwells on her, a wave of old memories comes forth, causing her to reminisce about a forgotten event from her childhood. From time spent with loved ones to promises from the past, Yama no Susume: Omoide Present follows the three girls as they cherish old memories while crafting entirely new ones to remember. [Written by MAL Rewrite]

A few months after the events of Steins;Gate, Rintarou Okabe and his group of friends are invited to tag along with their acquaintance Faris NyanNyan, who is participating in a Rai-Net battle event in the United States. There, they meet up with an old colleague: Kurisu Makise, who has been recalling fragmented memories of events that happened in the other world lines in the form of dreams. She confronts Okabe, questioning him as to whether these events—particularly the incidents between the two of them—did indeed happen. [Written by MAL Rewrite]

Recap of all 12 episodes of Tonikaku Kawaii.

Unaired episode included in the seventh Blu-ray and DVD volumes. Haruka is busy working at the agency so she can't help the idols with the preparations for the Christmas Party held by Shining Agency. A lot of memories and information are revealed while Starish is preparing for the party.