Kawakami City is famous for its strong dedication to its samurai ancestors. A healthy fighting spirit is always valued and it is even an important factor for success at school. Yamato, a second year student from Kawakami High School is always with his close friends (four boys and three girls). They have all known each other since they were young and have done many things together. While they have many other friends, this group of seven is a close-knit, inseparable group. They even have a secret base where they meet. With the new semester, they welcome two girls into their group and shortly after things begin to change.

Maji de Watashi ni Koi Shinasai! (真剣で私に恋しなさい!, lit. Seriously, Fall in Love with Me!), often abbreviated "Majikoi" (まじこい) is a Japanese adult visual novel developed by Minato Soft and released for the PC on August 28, 2009 (first press version) as a DVD and on October 30, 2009 (regular version) as two DVDs.
 
A sequel entitled Maji de Watashi ni Koishinasai! S was released in 2012, and a series of five fandiscs called Maji de Watashi ni Koishinasai! A are scheduled to be released throughout 2013.
 
A manga adaptation has been publishing in Comp Ace since May 2010, and an anime adaptation ran from October to December 2011. Sentai Filmworks licensed the anime series for North America under the title Majikoi ~ Oh! Samurai Girls for streaming, and for home video release in 2012. MVM films has licensed the series in the UK for release in 2013.