From Intercross:
The lovey-dovey love story between junior high school student/shoujo mangaka Sakura Rena and super cool Okita-kun is finally complete!! Going on a trip with just Okita-kun, having a stubborn love rival (?) suddenly appear, Renacchi is in big trouble!!

Note: Sequel to Manga Mitaina Koi Shitai, although published under a different name. VIZ Media just released it as a second volume.