MTL - Crossing the Other World to Build Gundam - Chapter 900 Surveillance and hands-on readiness

I intervene in all events of the game. And take it away.

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

Anna Watson’s life was far from easy. A battle with cancer left her frail, defeated, and questioning her life’s meaning. Her final moments were filled with regret for dreams unrealized and paths untaken. But when death embraced her, it wasn’t the end—she awakened in an entirely new world: the wizarding world of Harry Potter. Yet, this wasn’t the familiar era of Harry, Ron, and Hermione. She found herself in the time of the Marauders, a generation before the golden trio.Even more shocking, Anna had a new identity: Petunia Evans, the famously non-magical, bitter sister of Lily Potter. But this Petunia is different. Born as Lily's twin, Anna retains her memories of her past life and discovers she has magic—a shocking divergence from the character she once read about. Her magical abilities open up opportunities and challenges, not only for her but for her relationship with Lily, her new family, and the unfolding story of the wizarding world.As Anna navigates Hogwarts alongside the Marauders, Severus Snape, and her own twin, she realizes that the story she once knew is shifting. Her choices ripple across timelines, altering destinies and alliances. Struggling to reconcile her knowledge of the future with her growing affection for this new life, Anna must decide: should she preserve the world’s fate or carve out a new destiny for herself and those she loves?In this thrilling twist on the Harry Potter universe, the story explores themes of second chances, sibling bonds, and the weight of choice, painting a vivid and detailed picture of what might have been if Petunia Evans had the magic to change it all.

I was transmigrated into a work I liked and finally came back.But after, I was dragged into an Academy Romance Novel, which I skipped over after only reading the prologue.There I found a half-broken possessors who regressed endlessly.