Othellonia is holding a collaboration event with Tokyo Revengers from February 17. Players logging in to the game can get a free S+ collab character and a free copy of Takemichi!
Crusaders Quest x Berserk Collab Begins on March 9 : r/qooapp
Chain Chronicle x Utawarerumono Collab Comes Back on March 14 : r/qooapp
Othellonia x Tokyo Revengers Collab Runs from February 17 - QooApp News
Tokyo Revengers Episode 1 Review: An Ex-Delinquent Goes Back in Time – OTAQUEST, tokyo revengers ep 1
Othellonia x Tokyo Revengers Collab Runs from February 17 - QooApp News
Othellonia x Tokyo Revengers Collab Runs from February 17 - QooApp News
Tokyo Revengers - QooApp: Anime Games Platform
Othellonia x Tokyo Revengers Collab Runs from February 17 - QooApp News
Tokyo Revengers Episode 1 Review: An Ex-Delinquent Goes Back in Time – OTAQUEST, tokyo revengers ep 1
Shadowverse x Hatsune Miku Collab Runs Until April 27 : r/qooapp