It’s a two-sided New Year’s card, though it’s late even for Chinese new year TVT One side is the first picture, and the other is the second comic.
When the SB4 PV first released, everyone was curious to know who the silver-hair woman is. I once imaged she may be an adult Itsuki! And yes, itsuki’s secondary seiyuu is Sawashiro miyuki, the same as Maria. But later on (more information released) these are so many difference between them, and in deed, they are different characters XDD