The manga Isshiki-san wa Koi wo Shiritai (Isshiki-san Wants to Know About Love), by Ayune Araragi, has received a new extra chapter focused on Rinna Isshiki. The short story expands the manga's universe and offers a more intimate look at the character during a period of Meishi.
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In this chapter titled "Rinna Isshiki is a Lonely Girl," the narrative shows Rinna's solitary routine while Meishi is away on business for a few days. This more personal perspective helps to develop emotional nuances that were not explored previously.
Isshiki-san's extra chapter expands the story

The content was published in the June 2026 issue of Monthly Shonen Ace, known for serializing works of different genres within the seinen and shonen market. Furthermore, the chapter serves as direct supplementary material from the author.

It's worth noting that this manga by Ayune Araragi is also considered by readers to be part of the main series, possibly connected to chapter 52.6. This type of release reinforces the care taken in developing the characters and keeps the work's pace active.
Distribution and expectation for translation
The chapter was officially released in Japan in April 2026, but an English translation is still pending. Meanwhile, scanlation groups continue to contribute to the international distribution of the content.
What is Isshiki-san's story?
In the story, we meet Rinna Isshiki, a 17-year-old prodigy police officer who has never experienced romance in her life. Meanwhile, she interacts with Meishi Rokutanda, a clumsy yet kind detective, and this dynamic promises a sugary romantic comedy for fans of the genre.
For those who follow romance manga, this type of extra material usually provides relevant details.
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Source: X (@arrg15ayn)
