ReLIFE manga reaches its end in March 2018 as revealed in the 211th chapter by its creator, Yayoiso. In addition, on March 22, the anime's four-episode finale will be released.

Watch the trailer here: https://twitter.com/twitter/statuses/944224275505995776 

The cast of the final arc includes:

• Kensho Ono as Arata Kaizaki
• Ai Kayano as Chizuru Hishiro
• Ryohei Kimura as Ryō Yoake
• Haruka Tomatsu as Rena Kariu
• Yūma Uchida as Kazuomi Ōga
• Reina Ueda as An Onoya
• Himika Akaneya as Honoka Tamarai
• Daisuke Namikawa as Nobunaga Asaji
• Noriaki Sugiyama as Akira Inukai

Yayoiso launched the manga in Comico in 2013. The anime premiered in June 2016, while a live-action movie was released in April 2017.

Source: animenewsnetwork.com