In-game event: Tokyo Assassins

Some mysterious incidents, random attacks from accompaniment AIs, are happening around Tokyo. The Tokyo Police Department is called to investigate, and Logan, an AI detective, start following a clue…

Warming up: 2017.07.10 – 2017.07.15 (00:00 UTC)
Event period: 2017.07.15 – 2017.08.07 (00:00 UTC)
Cool down: 2017.08.07 – 2017.08.12 (00:00 UTC)

Check the event info page here.