One of Hayashi's early contributions to the alternative manga magazine Garo, Flowering Harbour is a love story filtered through the aesthetics of enka music, known informally as "Japanese blues".

The door of fate now opens... Piano prodigy Ichiro Yaso left the world of classical music after an incident at a competition. He vowed to never play the piano again, but now that he has a mentor claiming to be Beethoven, it may be time for his redemption! (Source: MANGA Plus) *Note: Includes the one-shots "LIFE LIAR FROM HELL" and "Violin-hime (バイオリン姫)".*

I was reborn... as a background character in a romance game?! And my fiancé is a hot duke?! Reincarnated as 'Leticia', a background character in a game, I found out that my twin sister, who has a horrible personality, pawned her fiancé, Lionel, off on me. When I first met Lionel, he was just as chubby as I'd heard... But I soon realized he was a diamond in the rough and decided to make him shine! But that's when I discovered that my newly hot fiancé is acting like he's head over heels for me...! (Source: Pocket Comics)

There's a new tough guy transfer student in Tokyo. His name is Tokio and he's raring to see how scrappy the locals are. But when he comes face-to-face with a Japan-obsessed red-haired kid that won't leave him alone until he tells him exactly what prefecture he's from, his life takes a turn for the crazy! This kid isn't just Japan obsessed, he's developed a martial art based on all the different prefectures in the country! (Source: VIZ Media)

Ikuo Fukami, a 12th grader who can sense people's emotions in colors, is summoned to a different world one day, surrounded by light. In this new world, he witnesses a scene where the woman who summoned him and her party are being attacked by a highly dangerous magical beast called a Riot Wolf. Although he has neither combat skills nor any battle-related abilities, Fukami possesses a unique power called "empathy," the only ability in the world that allows him to connect with magical beasts and communicate with them. Initially considered a disappointment, Fukami's true potential is soon revealed. Tired of the modern world, the high school student embarks on a journey to fight for the magical creatures and monsters in this new world, aiming for world peace. Thus begins an isekai tale of nation-building and adventure! (Source: Mangamo)

Rookie manga editor Nakamura (Name Changed) is being shadowed by a documentary crew. When she notices the same heroine appearing in multiple submissions to manga contests, she begins investigating the identities of their creators while the cameras keep rolling... (Source: MANGA Plus)

Iori Minase still can't forget about his favorite idol, Chika Izumi, even after she retires. One day, rumors start swirling about the new super hot freshman transfer student, Chikage Misumi, which Iori couldn't care less about... until he realizes that Chikage's actually the grown-up Chika Izumi in the flesh! The once cute and dainty girl idol is now a tall, handsome young man. Despite his new look, Iori's heart still goes a-flutter when he's around him...! Chikage, on the other hand, loathes the fact that Iori knows his secret, and decides to manipulate the upperclassman's adoration for him to his benefit. A heartwarming love story of a devilish hunk who has his cute little fanboy wrapped around his finger! (Source: Renta!) *Note: Includes one extra chapter.*

The manga artist Kentarou joins a group of adults as they return to the revival of a childhood fad—The Mini 4WD. As he's dragged around by the members of the force-fully created Mini 4WD team "Twin Stars Mechanomotive Force Laboratory," he comes to awaken to the joys of "All out play"...

Ichigoki is a regular kid who can't wait to start high school. But an unexpected encounter with the fists of an eastern lowland gorilla that has escaped from the zoo results in his death... He somehow regains consciousness only to discover that he's become a fullmetal-bodied cyborg?! Thus begins cyborg Ichigoki's wacky and aggravating misadventures with Misao, his mad scientist friend from childhood! A coming-of-age, buddy, gag manga from Seiji Hayashi, creator of I'm From Japan and Chikyuu Ningen Tera-chan! (Source: MANGA Plus)

Lavinia is a villainous queen in a novel who is murdered by someone she trusts. When the reader wakes up as Lavinia, she knows there are five murder suspects: her seemingly loyal knight, her sly chancellor, her spy who was formerly an assassin, a brutal tribal king, and her brother, who's also her political rival. These men are all fixated on her, but when Lavinia changes her tyrannic ways, their obsession becomes less hostile and more friendly... even romantic, for some! Although her odds of survival are higher, Lavinia isn't sure she can juggle the affections of her dangerous suitors... (Source: Tappytoon)

Some marriages don't go according to the original plan...