Where do I officially pre-register for Aniimo?

Open the official Aniimo website and use its Global Pre-Registration campaign.

Which action earns the mysterious Susuta egg?

Pre-registering on the official website is the stated condition for claiming the mysterious Susuta egg.

Log in over multiple days to meet the stated condition for receiving a random Perfect Egg.

Use Aniimo's official Global Pre-Registration route and follow the separate conditions for its two stated egg rewards.

Pre-registration is tied to a mysterious Susuta egg, while logging in over multiple days is tied to a random Perfect Egg.

Where do I officially pre-register for Aniimo?: Open the official Aniimo website and use its Global Pre-Registration campaign.
Which action earns the mysterious Susuta egg?: Pre-registering on the official website is the stated condition for claiming the mysterious Susuta egg.
How is the random Perfect Egg earned?: Log in over multiple days to meet the stated condition for receiving a random Perfect Egg.