Echocalypse -緋紅の神約-

YOOZOO Inc.

In-app purchases

About this game

- Summer Event Arrives
The "Echocalypse -Scarlet Promise-" 2025 Summer Event has begun! Receive amazing perks just by logging in! Fill in any gaps with your choice of UR characters! The Summer Festival Event has begun! Unlock the cool, summer-exclusive Scarlet Girl skin for free and get excited about summer with specific touch effects! The new training system, "Witch's Room," has been implemented, allowing you to compete with AI witches and overcome any obstacles. Make a contract now and unleash your own summer miracle!

Receive a UR character as a gift upon logging in! Choose freely from a powerful lineup.
Log in to receive amazing perks! Get popular UR characters for free! Strengthen your team with characters for different roles, get the ideal fighting power from the start of the game, and form your dream summer team! All characters can be "One-Tap Star Inherited"! Eliminate strength concerns and reduce training time by 90%! Overcome power differences and even achieve a comeback victory with the right formation!

Summer Festival Bonus Broadcast! Get exclusive skins by logging in.
Summer Festival Bonus Broadcast! Don't miss out on these exclusive skins! Log in to receive an SSR summer-exclusive skin. Unlock thrilling touch effects! Forge interdimensional bonds with these high-quality, charming scarlet girls through intimate fingertip interactions! Plus, unlock pledge skins to unlock contracts. Are you ready to be captivated by them?

A new witch training system has been implemented! Unlock exclusive stories through interactive play.
As darkness quietly approaches, once-compassionate companions are infected by an unknown power and transformed into "witches." To rescue them from the brink of destruction, Trelic secretly built the "Witches' Hall," which doubles as both a clinic and a refuge in the Restricted Zone. Stories of desire and salvation intersect among the witches. Are you ready to take on this bittersweet mission?

Enjoy casual play! Enjoy a ton of fun mini-games to brighten up your free time! Daily missions and events lighten the load and allow you to easily complete them in your spare time! Casual relaxation and strategy come together - acquire a wealth of development materials through mini-games such as puzzles, spot the difference, and card flipping. The game also features a rich and fun dormitory system. Customize the themed interiors freely and build a dream paradise for the Scarlet Girls.