When regular salaryman Yoshida wakes up one Sunday morning after a long night at the bar, the last thing he expects to see is that his tiny apartment has a new resident—an unfamiliar high school girl. The previous night, despite finally gathering the courage to confess to his boss and longtime crush, Airi Gotou, Yoshida was rejected. After drowning his sorrows at a bar with his good friend Hashimoto, Yoshida headed back to his home in a drunken stupor, only to run into Sayu Ogiwara, a runaway high schooler. She asked him to let her stay the night, and with his judgment clouded by alcohol, Yoshida complied. Now, with his head on straight but with no memory of last night's events, Yoshida has Sayu explain just how she ended up sleeping at his apartment. Having listened to her story, Yoshida finds himself unable to kick her out—especially after learning that she came all the way from Hokkaido! So, despite his reservations about sheltering an underage girl, Yoshida allows her to stay, and their life together begins.

For the first time since graduating high school, 30-year-old Moriko Morioka is unemployed—and she couldn't be happier. Having quit her long-standing job of over 11 years, Moriko quickly turns to online games to pass her now-plentiful free time, reinventing herself as the handsome and dashing male hero Hayashi in the MMO Fruits de Mer. With the pesky societal obligations of the real world out of the way, she blissfully dives headfirst into the realm of the game, where she promptly meets the kind and adorable healer Lily. Befriending each other almost instantly, the two become inseparable just as Moriko herself becomes more and more engrossed in her new life as Hayashi. Eventually, Moriko adopts the reclusive lifestyle in its entirety, venturing out from the safety of her apartment only when absolutely necessary. Meanwhile, unbeknownst to Moriko, a timid 28-year-old corporate worker named Yuuta Sakurai has also logged onto Fruits de Mer from the other side of town. Coincidentally bumping into each other at the convenience store one night, both write off their meeting as no more than just another awkward encounter with a stranger—however, fate has more in store for them than they think.

After her boyfriend breaks up with her for another girl, college student Akane Kinoshita wrestles with a broken heart and the memories he left behind. Loading up Forest of Savior, the MMO they used to play together, she forms a plan to get back at her ex-boyfriend through an in-person event for the game. In the process, she runs into someone unexpected: Akito Yamada, a gaming legend who just happens to be her guildmate. Desperate for support, Akane ropes the asocial Yamada into helping with her scheme and lending her a shoulder to cry on. The differences between Akane and Yamada soon become apparent as they spend time together, yet they cannot help but notice each other's inner qualities. As the two gain more experience with one another in and out of the game, their tentative acquaintance may level up in a way neither expects.

Filled with an overwhelming sense of wonder for the world around her, Mari Tamaki has always dreamt of what lies beyond the reaches of the universe. However, despite harboring such large aspirations on the inside, her fear of the unknown and anxiety over her own possible limitations have always held her back from chasing them. But now, in her second year of high school, Mari is more determined than ever to not let any more of her youth go to waste. Still, her fear continues to prevent her from taking that ambitious step forward—that is, until she has a chance encounter with a girl who has grand dreams of her own. Spurred by her mother's disappearance, Shirase Kobuchizawa has been working hard to fund her trip to Antarctica. Despite facing doubt and ridicule from virtually everyone, Shirase is determined to embark on this expedition to search for her mother in a place further than the universe itself. Inspired by Shirase's resolve, Mari jumps at the chance to join her. Soon, their efforts attract the attention of the bubbly Hinata Miyake, who is eager to stand out, and Yuzuki Shiraishi, a polite girl from a high class background. Together, the four spirited girls set sail toward the frozen south, all in search of something great.