[Guido]

I believe we would be seeing Orion until the latter half of the show.

Spoiler:

Everytime Heroine gets herself caught in an impending, life-threatening, accident she's suddenly whisked into another, brand-new world with the following constants:
- She awakens inside the new world at exactly the same date, the beginning of August.
- Shin, Ikki, Touma, and Kento exist in each of the worlds, and likely nothing about their backgrounds and experiences with the heroine have changed.
- Her coworkers along with her employer exist as well, but they'll be behaving in a completely different mood and personality than those from the last world.

Differences:
- Heroine experiences through each different world each one of the guys: In the second world, she related with Shin and found a great deal about him; in the new world, she's now having a relationship with Ikki, and he'll talk to her about him.
- She gets to experience a different set of brand-new circumstances and activities.


Result:
- I believe Heroine needs to live all of those worlds to gather clues and pieces from the respective guys, in order to her to find and piece back together her memories.
- Orion plays a role for that, and I believe he's necessary to meet again with Heroine as soon as possible.

Wild Card:
- The mysterious component that let's more than meets the eye is the Photographer Guy, who knows more about Heroine than the audience. For now, I will call him Joker. If my hunch is right, the last world that Heroine gets to live will involve her with Joker.