Hana-Kimi is a story about the mishaps and adventures of Mizuki Ashiya as she poses as a boy at an all-boys Japanese high school. She does this in order to track down her crush and inspiration, the champion athlete Izumi Sano.
I know it sounds ridiculous and fluffy but if you are looking to laugh and just find a bit of happiness then this is the manga for you. Really and truly.
Taiwan (2006): Hanazakarino Kimitachihe
Japan (2007): Hanazakari no Kimitachi e
Japan (2011): Hanazakari no Kimitachi e
Korea (2013): To the Beautiful You