There's a rumor about a mysterious phenomenon called "puberty syndrome." For example, Sakuta Azusagawa is a high school student who suddenly sees a bunny girl appear in front of him. The girl is actually a girl named Mai Sakurajima, who is Sakuta's upperclassman who is also a famous actress who has gone on hiatus from the entertainment industry. For some reason, the people around Mai cannot see her bunny-girl figure. Sakuta sets out to solve this mystery, and as he spends time with Mai, he learns her secret feelings. Other heroines who have "puberty syndrome" start to appear in front of Sakuta. 
(Source: Anime News Network)

Book 1 of the Seishun Buta Yarou series.
 
Out of sight, out of mind! Bunny girls do not live in libraries. This is simply common sense. And yet, that's exactly where Sakuta finds one in the wild. More bewildering is who the bunny girl is: Mai Sakurajima, a girl one year older than Sakuta, famous at their school for her acting career even though she's currently on break. To top it all off, it seems like no one else in the library can see Mai at all, no matter what she does or...wears. Wanting to find out more about this mystery and maybe get a little closer to this beautiful upperclassman in the process, Sakuta launches an investigation to discover why an unforgettable bunny girl keeps becoming totally invisible.
 
(Source: Yen Press)

In Fujisawa, where the skies are bright and the seas glisten, Sakuta Azusagawa is in his second year of high school. His blissful days with his girlfriend and upperclassman, Mai Sakurajima, are interrupted with the appearance of his first crush, Shouko Makinohara. For reasons unknown, he encounters two Shouko's: one in middle school and another who has become an adult.
 
 
As Sakuta finds himself helplessly living with the Shouko's, the adult Shouko leads him around by the nose, causing a huge rift in his relationship with Mai.
 
 
In the midst of all of this, he discovers that the middle school Shouko is suffering from a grave illness and his scar begins to throb...
 
 
(Source: Aniplex USA)

Bunny girls do not live in libraries. This is simply common sense. And yet, that's exactly where Sakuta runs into one in the wild. More bewildering is who the bunny girl is: Mai Sakurajima, an upperclassman and well-known actress currently taking a break from industry work. Wanting to find out more about the mystery surrounding Mai (and maybe get a little closer to her in the process), Sakuta launches an investigation to figure out what's making this bunny girl invisible to everyone around them.
 
(Source: Yen Press) 
Note: Chapter 17 and 18 of the magazine publication were merged into chapter 17 of the tankoubon release; chapter count reflects the tankoubon release.

Book 2 of the Seishun Buta Yarou series.
 
How far can a fake relationship go?
 
Mai is no longer invisible--she's acting again, and she finally said yes when Sakuta asked her out for the millionth time. Life couldn't be better for Sakuta...until he wakes up and finds himself reliving the morning before she agreed to date him!
 
Assuming this weird time slip to be another case of Adolescence Syndrome, Sakuta begins searching for clues and stumbles upon the first-year Tomoe. Though the last time they saw each other involved getting kicked in the butt, now she's desperately trying to avoid getting asked out by the boy her friend is crushing on so she won't be ostracized. One ruse leads to another, and soon news spreads that Sakuta is Tomoe's boyfriend. Now how is he going to explain this to Mai...?
 
(Source: Yen Press)

Book 3 of the Seishun Buta Yarou series.
 
SOMETIMES MORE IS JUST CRAZY! 
Just before summer break, Sakuta encounters Shouko Makinohara, a girl in junior high with the same name and face as his first love. Of course, that should be impossible, since she would be in college by now. Then, as if one mystery wasn't bad enough, Adolescence Syndrome strikes again. His impassive friend from the science club, Rio, discovers she has a doppelgänger. One of the Rios is forced out of her house and winds up staying at Sakuta's apartment. Definitely not the girl he expected to find himself living with...And when Mai insists she's going to sleep over, too, Sakuta's summer vacation descends into pure chaos.
 
(Source: Yen Press)

Book 4 of the Seishun Buta Yarou series.
 
DOUBLE TROUBLE?!
 
​Sakuta is eager to finally have a chance to spend time with Mai again, but instead, he's greeted by a stranger who looks just like her. Apparently, Adolescence Syndrome is paying Mai another visit and has forced her to swap bodies with Nodoka Toyohama, a flashy up-and-coming idol...who also happens to be Mai's half sister! With no resolution in sight, each sister must pretend to be the other and go about their respective lives as best they can. Trouble is, it seems like Nodoka is preoccupied with something besides walking in Mai's shoes...
 
(Source: Yen Press)

Book 5 of the Seishun Buta Yarou series.
 
GUESS WHO’S BACK?
 
​After years without contact, Sakuta has received a letter from his first love, Shouko, asking to meet at Shichirigahama Beach. Of course, now that he’s in a happy relationship, he’s not quite sure how to respond...or how to explain the situation to his girlfriend, Mai. Maybe he’ll just focus on helping his panda-loving, stay-at-home sister achieve her goal of returning to school for the time being. But this is easier said than done, given that she hasn’t left the house for two whole years...
 
(Source: Yen Press)

Sakuta may have cured Mai's Adolescence Syndrome in the nick of time, but now he faces a no less harrowing task-convincing her to officially date him. After managing to win that round of verbal fencing, he gets some well-deserved rest...only to wake up "yesterday," with all his progress reset. This inexplicable phenomenon seems to be centered on Tomoe Koga, and the only cure is to...pretend to be her boyfriend?!
 
(Source: Yen Press)

“For the past three days, there have been two Rio Futabas.” After successfully breaking the time loop that he and Koga were trapped in, Sakuta’s threshold for what qualifies as “odd” was higher than most. So seeing his friend Futaba in a net café late at night should have been downright unremarkable—if he wasn’t already on the phone with another Futaba…The ever-logical second-year has a doppelgänger, and neither one can (or will) explain what’s caused this sudden case of Adolescence Syndrome. With one of the Futabas staying at his place, Sakuta will have to work fast in order to solve this. After all, who knows what could happen if the two doppelgängers meet?"
 
(Source: Yen Press)
 
Note: Includes the prologue.

Sakuta's shut-in sister, Kaede, has been content always being at home after the bullying incident that put her there. Plus, that's where her favorite onii-chan is! Yet, slowly but surely, Kaede's feelings are beginning to change as she looks to the world beyond the four walls of her home.
 
(Source: Yen Press)

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