When Shuichi was a child, he used to play with Yuu, a carefree boy who enjoyed exploring, roughhousing, and video games, and the two quickly became best friends. Now, ten years later, they've been reunited at an arranged marriage meeting, and it turns out that boy was actually a girl all along! What's more, she's become a beautiful young woman who wants him for a husband! It's an awkward reunion, but can the two rekindle their friendship? And maybe let it become something more...?

The hit manga The 100 Girlfriends Who Really, Really, Really, Really, Really Love You gets its first-ever spin-off novel! Rentaro loses his memory, Nano gets possessed by an alien, everybody gets isekai'd into Shizuka's favorite book, the cast pilot a giant robot--what on earth is going on?! Includes brand-new illustrations from series artist Yukiko Nozawa!

Love never dies when you're the almighty boyfriend, Aijo Rentaro, because he's destined to have one hundred soulmates! The newest member of the Rentaro family, Ahko, is all about what's trending. It's totally her thing! Her and Rentaro's love life is about to get #

It's time for the quad-town sports day, and all the girlfriends are invited! But even though they've each got special talents that should make beating the evil Kiraisugi Town a cinch, their opponents refuse to play fair! Meanwhile, a new girlfriend makes her debut! Please welcome Mai Meid-- Wait, what was that crashing sound?

Rentaro has been living life to its fullest, trying to make his ever-increasing number of girlfriends as happy as can be. Whether they're obsessed with violence, deeply attracted to numbers, or perpetually drunk, he will do anything within (or even without) reason to earn their smiles. Even if that means proposing marriage! Meanwhile, the girlfriends all pretend to be cats to welcome the newest member of the family, Nekonari Tama, a twenty-year old woman who decided being a human was too h...

Rentaro's already got plenty of strong girlfriends, but Kaho Eira, the half-Brazilian capoeira expert, would give them all a run for their money! With the power to stop cars and beat up bad guys, she'd be unstoppable--except that she's deathly scared of anything that can't be taken out with a kick or a punch. Meanwhile, it's finally time for Shizuka to face her mother about being unable to speak with others, and the family battles yokai at school. It's a volume filled with tears and laughs...

Some would say the best way to teach is by example. But for Rentaro's degenerate drunk of a social studies teacher (coincidentally his newest girlfriend), the only way she can teach is by shouting at the top of her lungs, "Don't end up like me!" It's 100 Girlfriends at its most morally corrupt! Will the Rentaro family get hammered together, or will the publisher have to step in before it all gets out of hand?

You'd think Rentaro would have all his bases covered with his twenty-one girlfriends. There's a hungry one, a horny one, a drunk one... But he's yet to have a girlfriend so addicted to violence that she literally starts drooling at the sight of blood and gore! It's yet another volume of wild multi-girlfriend hijinks as the family attempts to decipher Miss Naddy's American accent, goes on a series of unique dates, and even gets a bit handsy!

Rentaro has been blessed (Cursed? Blursed?) with the burden of having one hundred soulmates. Not a problem, though. Rentaro's love will never falter, just like his new girlfriend's sense of duty. Kendo club captain Kishika Torotoro is unwavering in her dedication to her chivalric lifestyle, but this high standard is a lot to live up to! Hopefully, Rentaro's love can cut through her shining armor and get her to share the load!

Rentaro's never had an easy time appeasing his twenty-two-and-counting girlfriends. One's eternally hungry, another adores violence, and another secretly wants to be treated like a baby. But when he locks eyes with a twenty-third lover who's so in love with numbers that there's little room left in her heart for anything else, what's the world's best boyfriend to do? Meanwhile, the family goes night swimming, ventures on a fluffy obstacle course, and pairs off for some girlfriend-on-girlfri...

Most of Rentaro's soulmates have been oddballs of some kind, but his newest girlfriend, the idol Saiki, is actively trying to be one! Obsessed with being known as an abnormal idol, the only person she could possibly date is the boy already dating twenty-five other girls. Following in Saiki's footsteps, the Rentaro family battles over who's the strangest, reforms their idol group, and puts on the show of a lifetime!

Rentaro's new girlfriend, Momi Momiji, gets very handsy because she's training to be the world's best masseuse. Her hands will bring bliss to every strained muscle and stiff joint she comes in contact with. So lie back and relax. Momi and Rentaro's tale is a touching one!