Too Many Girlfriends
Total Chaos: The Messy Love Rectangle
Daikonsen! Guchagucha koi no shikaku kankei
"Usagi and Makoto are shocked to discover their crush Motoki has a girlfriend named Reika. His relationship is in jeopardy, however, due to Reika's chance to study abroad. With nothing to lose, Usagi and Makoto aggressively go after Motoki's affection." (source)