I'm just hearing about this celebration and I thought...how I never heard anything about this day!!! LOL this is awesome! can't wait for the next one! hahaha! what do you think guys? Do you knew about this day? haha
Just a heads up, you might want to prepare to update this soon. It suffers from no-progress bug that is currently under rapid debugging.
Scheduled to be fixed on May 1st at 22:00 JST. 聖騎士リアナ