Fans of shōjo manga have reason to celebrate: My Love Mix-Up! artist Aruko has teamed up with writer Kizashi Haruyoshi to launch a brand-new series, Sekai de Ichiban Shiawase! (Happiest in The World!), on Shueisha’s Manga Mee web platform. The announcement has stirred excitement among readers who have followed Aruko’s distinctive art and heartfelt romantic comedies over the years. Below we break down what we know so far, the creators’ track record, and what this new collaboration could mean for shōjo manga fans.
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New Series Announcement: Sekai de Ichiban Shiawase!
The new manga, Sekai de Ichiban Shiawase!, launched on Manga Mee on Monday, marking the first official collaboration between Aruko and Kizashi Haruyoshi on a serialized project. Early promotional artwork shared by the creators hints at a warm, character-driven romantic story—an area where Aruko’s expressive illustrations and sense for emotional beats have consistently shone. With serialization on a major platform like Manga Mee, the series is well positioned to reach both domestic and international shōjo readers.
Creators’ Background and Collaborative Chemistry
Aruko is widely recognized for their clean art style and ability to convey nuanced romantic dynamics. They previously collaborated with writer Wataru Hinekure on Kimagure a la Mode (Whimsical a la Mode), which ran through March 2025 and was recently collected into a compiled book volume. Aruko’s collaborations have shown a pattern: pairing detailed character design with stories that balance humor and heartfelt moments.
Kizashi Haruyoshi, the new series’ writer, brings fresh narrative voice to the partnership. Haruyoshi’s involvement was teased via social media, where the announcement image was posted. Fans are eager to see how Haruyoshi’s storytelling will mesh with Aruko’s visual strengths, especially after the success of Aruko’s previous romantic comedies.
Why this pairing matters
Both creators have histories steeped in romantic and slice-of-life storytelling, which suggests Sekai de Ichiban Shiawase! will focus on relationship-building, character growth, and emotional sincerity—elements that typically resonate with shōjo audiences. The pairing could also bring new tonal variety depending on Haruyoshi’s narrative approach, potentially broadening Aruko’s readership.
Previous Works and Notable Adaptations
My Love Mix-Up! (Kieta Hatsukoi / title variations)
Aruko and Wataru Hinekure’s My Love Mix-Up! first debuted in Bessatsu Margaret in June 2019 and concluded in June 2022. The series produced nine compiled volumes, with English publication through Viz Media. My Love Mix-Up! earned attention not only on the page but also through multiple live-action adaptations: a Japanese TV drama premiered in October 2021 and became available on international streaming services later that year, and a Thai adaptation launched in June 2024. These adaptations showcased the series’ broad appeal and demonstrated how Aruko’s character-driven narratives translate well to other media.
Kimagure a la Mode
After My Love Mix-Up!, Aruko teamed up with Wataru Hinekure again for Kimagure a la Mode, a short-running series that concluded in March 2025. The title continued the duo’s interest in romantic comedy dynamics and reinforced Aruko’s reputation for crafting charming protagonists and heartfelt interpersonal moments.
My Love Story!! (Ore Monogatari!!)
Earlier in Aruko’s career, a different collaboration with Kazune Kawahara produced My Love Story!! (Ore Monogatari!!), which began as a 100-page original story and later became a serialized hit in Bessatsu Margaret. The series ran until July 2016 and was adapted into both an anime (April 2015) and a live-action film (October 2015). These adaptations, plus international licensing of the manga volumes, helped cement Aruko’s status as a creator whose work appeals across mediums and global audiences.
What to Expect from Sekai de Ichiban Shiawase!
While plot details remain sparse, the title—Happiest in The World!—suggests a focus on joy, positive relationships, and possibly the pursuit of personal fulfillment through romance and friendship. Given Aruko’s track record, expect:
- Well-realized character interactions and expressive facial work
- A balance of lighthearted comedy with sincere emotional moments
- A slice-of-life pace that lets relationships develop organically
Collaboration with Kizashi Haruyoshi may also introduce new themes or structural twists that differentiate this project from Aruko’s earlier titles. Keep an eye on serialization updates for teasers about the central characters and setting.
Release Details and Where to Read
Sekai de Ichiban Shiawase! is serialized on Shueisha’s Manga Mee web platform. Early promotional posts and the official launch were shared on social platforms connected to the creators and the magazine. For the official announcement, see the creator’s post on X/Twitter: Kizashi Haruyoshi’s X post. Additional updates are being shared by Manga Mee’s account: Manga Mee announcement.
Tips for international readers
As with many Shueisha digital releases, international availability may vary. Readers outside Japan should watch for licensed translations from established publishers or official streaming/reading platforms that partner with Shueisha. Given Aruko’s past titles received international releases and adaptations, there’s a reasonable chance publishers will pursue localization if the series gains traction.
Final thoughts
Sekai de Ichiban Shiawase! looks like a promising new chapter in Aruko’s career, especially with the addition of writer Kizashi Haruyoshi. Fans of romantic comedies and character-focused shōjo stories should find much to anticipate: expressive art, emotionally resonant storytelling, and the potential for further adaptations or international releases. Keep following the official Manga Mee updates and the creators’ social posts for the latest chapters and announcements—this collaboration may be one of the year’s most delightful new shōjo entries.
