Yamada-kun and the Seven Witches
山田くんと7人の魔女 (original)
One day, high-school boy Yamada bumps into the beautiful girl Shiraishi on the stairs (literally), and their lips touch as they fall. When they regain their wits, they realize that they have swapped bodies. As time progresses, the two realize that this is not the only mysterious happening in the school.
Starring Ryota Osaka, Saori Hayami, Eri Kitamura, Yui Makino, Yuki Takao, Aoi Yuki, Kana Hanazawa, Masumi Tazawa, Toshiki Masuda, Maaya Uchida
Watch "Yamada-kun and the Seven Witches" on Crunchy Roll released in 2015. It's a comedy and animation show, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of show, and is currently available to watch for free.