Azur Lane - School event SURPRISE

I didn't notice till the end of this event...............
I just gained the cute school uniform skin for one of the ships, so I decided to try and change my secretary for a while: not even I can resist to school uniforms charm! @@

Aaaaaaaaand... SURPRISE
The whole starting screen changed as well: sakura blossoms, autumn-like atmosphere and so on. Not sure if this works with anyone of the exlusive skins, but I bet it does.
I loved this new screen so much I think I'll keep it for a very long time - or till a new, super cute event!!