I used to watch a lot of movies like this but I forgot T^T
Strobe Edge (Japanese): same time with L DK, the guy unintentionally flirts, female lead has a crush on him and is shy around him.
Suki na Hito ga Iru Koto (Japanese): 3 guys and 1 girl, male lead (2nd guy) is flirty like Black Devil and White Prince-kind of
Sassy Go Go (Korean): The male lead flirts and tease the female lead. The girl starts to gets all flustered when she likes him back.
Say I Love You (Japanese): He flirts first, then they become a couple, but he seems like a bad guy to me so I dropped this one :(
Wolf Girl and Black Prince (Japanese): Not bad girl but he orders the female lead around, some flustering moment, remind me of Kurosaki-kun
Ani ni aisaresugite komattemasu (Japanese): A lot of girls flirt the girl, she fell in love/shy/get flustered. Found her true love at the end.
Mischievous Kiss The Movie: High School (Japanese): Live in same house, shirtless scene, back up against wall and kiss,...