Merize going back and becoming the author of First Love Memories, she prolly had her memory wiped but bits of it inspired the manga huh
It kinda fits.
And it sets the stage for a "all pieces come together" moment.
We know Iruma has worked as an assistant for the mangaka of first love memories.
We know that Merize was great at drawing , and that her true name is not Merize, so even if Iruma spoke the author's name , nobody who knew her would be able to make a connection.
What I expect to see, is Henry showing Ameri a portrait of her mother (I refuse to believe that Henry never had one made or has a self portrait of hers somewhere close by.)
Then by chance or intentionally Ameri shows Iruma her mother's portrait Iruma is shocked(and the chapter/episode ends in a cliffhanger as a fakeout to spark the interest of those that noticed Merize looks like Iruma with big breasts.
Only to have Iruma say something akin to "why is (real name here) sensei's portrait here!".
A sweet emotional scene happens and now the books have changed from being a curiosity that Ameri likes, to being a treasured heirloom for both Ameri and Henry.