Kodansha announced today that the two tankobon volumes of Shingeki no Kyojin: Kuinaki Sentaku/Attack on Titan: No Regrets, a spin-off manga of the Attack on Titan series illustrated by Hikaru Suruga, will be reissued as a full color edition on June 9, 2017.
The popular spin-off series has printed over 1.5 million copes in Japan.
The first original tankobon was published in April 2014, then the second followed in August of the year.