Echocalypse: Scarlet Covenant

- Summer Event Now Live
[Echocalypse] 2025 Summer Event is now live! Log in now for massive rewards, including a UR Case of your choice to help complete your lineup! Join the Summer Festival and unlock the free, limited-time summer outfits for your favorite Case! The brand-new development system [Witch's Den] is now online. Outwit the AI witches and seize victory! Form your pact and uncover your summer miracle today!

Log In and Get A UR Case for Free—Build Your Dream Lineup with Ease!
Log in for epic rewards—claim a popular UR Case for free! Fill the gaps in your lineup with top-tier Cases across all roles and kick off the summer with your ideal squad! All Cases support [Quick Star Inheritance], saving upgrade time by 90%! Break through strength ceilings and turn the tide with a smart lineup!

Summer Festival Rewards—Claim Limited-Time Outfit by Signing In!
Summer Festival rewards are here. Don't miss your free outfit! Log in now to claim an exclusive SSR Summer Outfit and enjoy a brand-new, heart-fluttering interactive experience! Meet charming Cases brought to life with stunning visuals and fun fingertip interactions. Unlock Oath-exclusive outfits and get ready to fall for them all over again!

New Witch Development System—Unlock Exclusive Interactive Stories
As darkness creeps in, your once-resonant companions fall under a mysterious power, transforming into dangerous yet captivating [Witches]. To save them from the brink of destruction, Teslovik has secretly built the [Witch's Den], a hidden refuge that's part clinic, part forbidden zone. Desire and redemption intertwine within its walls. Are you ready to take on this bittersweet mission?

Casual Gameplay Made Easy—Relax and Have Fun Anytime
A delightful collection of mini-games is here! With lighter daily tasks and flexible playtime, you can enjoy the game even during short breaks. Match-3, find the difference, and memory flip—earn tons of upgrade materials just by playing casual games. Plus, explore the fun dormitory system: decorate themed rooms freely and create a dream space for your scarlet girls!