According to the mangaka’s twitter, an OVA project of manga Hori-san to Miyamura-kun that started 3 years ago is now in the process of being completed. Hori-san to Miyamura-kun started out as a web-comic series by HERO, which was picked up by Square Enix in 2007 to become a 10-volume manga series.
Synopsis:
People say that the youthful days are always bittersweet, but maybe it’s just bitter? Kyouko Hori is a flashy high school girl who, despite her ostentatious appearance, excels in academics and has a family-loving character. Izumi Miyamura is a bland high school boy who, despite not wanting to stand out in class, secretly wears piercings outside of school and has a large body tattoo. One day, Miyamura finds Hori’s little brother injured and helps him back to Hori’s house, where the relationship between Hori and Miyamura begins with Hori’s discovery of Miyamura’s secret.
Source (Japanese): Twitter, Square Enix (cover page available)
Hori-san to Miyamura-kun on MAL