Nisekoi

Overview
Raku Ichijo is an average high school student. He also happens to be the sole heir to the head of a Yakuza Family called the Shuei-gumi. 10 years ago, Raku made a promise… a secret promise with a girl he met. They promised one another that they will “get married when they reunite.” Since then, Raku never let go of the pendant the girl gave him.
Nisekoi Collection
Season 1 (20 Episodes)
Love is eternal! As children, Raku Ichijou and a childhood friend gave each other a promise. As a symbol for this promise, he kept a lock, while his sweetheart received the matching key. With the dream to find his former love again, Chitoge Kirisaki enters his life. To make peace between the two rivalling, criminal family clans, Raku and Chitoge must fake a relationship, although the both of them could hardly be any more different. When Raku finds out that both Chitoge and their mutual friend Kosaki Onodera both have a key from their past and more and more girls flock around the protagonist, the romance can begin.
Season 2 (12 Episodes)
Recommendation & Similar
Castle Town Dandelion (2015)
K-ON! (2009)
NEW GAME! (2016)
Kanokon (2008)
Maria the Virgin Witch (2015)
Chrome Shelled Regios (2009)
Make My Heart Smile (2021)
Oreimo (2010)
Invaders of the Rokujouma!? (2014)
Catch Me at the Ballpark! (2025)
A Thirty-Year Old's Health and Physical Education (2011)
K (2012)
A Sister's All You Need (2017)
Cautious Hero: The Hero Is Overpowered but Overly Cautious (2019)
Date a Live (2013)
Domestic Girlfriend (2019)
Myriad Colors Phantom World (2016)
Barakamon (2014)
PERSONA5 the Animation (2018)
My Little Monster (2012)