SEGA has announced that their hit mobile title Chain Chronicle (チェインクロニクル) for iOS and Android will launch a collaboration event with Attack on Titan on 1st April, the premier of Attack on Titan Season Two.
Currently SEGA has launched a teaser link with an on-going pre-registration event for the collaboration. Those who pre-register for the event will receive bonus rewards when the event begins!
Collaboration Event Site: http://chronicle.sega-net.com/shingeki_cp/