If you're looking for anime similar to NYANKEES, you might like these titles.
Onizuka Eikichi and Danma Ryuji are best buddies waiting for their love life to bloom, but in order to do this they must cast aside their delinquent ways. Eikichi and Ryuji clean up their act, transfer to a new school, and become hard-working students. This act successfully attracts the ladies, but it also attracts other delinquents. With their lives constantly under threat, Eikichi and Ryuji's secret identity as the infamous Oni Baku biker gang is revealed! The end result? Trouble! With danger abounding, the Oni Baku duo face the odds and ends of love while solving all of life’s problems with aggressive violence!
Meet Eguchi Yoosuke, leader of a high-school biker gang and also the school's handicrafts club. Which means he divides his time between fistfights and fancy needlework. If you think he's weird, wait until you meet the rest of his gang....
Bouya Harumichi is a new transfer student to Suzuran all-boys high school, a place where only the worst delinquents assemble. Due to its large amount of delinquents who are hated by the general people for their inauspiciousness, similarly to crows, it is also known as "Crows High School". Harumichi is an insanely strong fighter but has an irresponsible personality. How will he act in this new environment where everyone is a delinquent?
Takemichi Hanagaki is a freelancer that's reached the absolute pits of despair in his life. He finds out that the only girlfriend he ever had in his life that he dated in middle school, Hinata Tachibana, had been killed by the ruthless Tokyo Manji Gang. The day after hearing about her death, he's standing on the station platform and ends up being pushed over onto the tracks by a herd of people. He closes his eyes thinking he's about to die, but when he opens his eyes back up, he somehow had gone back in time 12 years. Now that he's back living the best days of his life, Takemichi decides to get revenge on his life by saving his girlfriend and changing himself that he'd been running away from.