This is a separate entry for the 18+ content on Fantia which cannot be found on Twitter. It's the side content of [How The Little Brother Who Turned Into A Girl Became His Big Brother's Girlfriend.](https://mangadex.org/title/ff4b6bfd-40b4-4a84-b60e-1006c46c106b/how-the-little-brother-who-turned-into-a-girl-became-his-big-brother-s-girlfriend)

When I returned home for the first time in a long time, my little brother transformed into a girl!? --- **Link:** - [Fantia 18+ Content](https://mangadex.org/title/7a23de9c-01b8-43bd-ac38-0bfe0bebcc3b)

Sasazuka Kazuharu (16) wakes up on the day of his job interview to find out that he has transformed into a girl.

When I returned home for the first time in a long time, my brother transformed into a girl!?

"Twitter" is a web service that is extremely popular all over the world now posting and sharing short sentences with 140 characters or less. And this is a rumor…there seems to be a humanoid interface to observe users and develop functions in order to improve the contents of the service more. This girl is called “Twitter-san”.