Crossover Anime: The Heroine is in Trouble? I Take Advantage of the Situation

My name is Seiji Fujiwara, a time traveler.
What I like most is not saving the world, but admiring the helpless yet beautiful appearance of those proud heroines when they fall into the abyss.
When Kasumigaoka Utaha, the senior student in black stockings, took off her stockings in front of me in order to pay for her three million yen surgery.
When the blonde loser Eriri kneels down and begs me to invest in her pursuit of her dreams.
Beneath the icy beauty of the snow, in order to rebel against her family, she voluntarily entered my room.
I just realized how interesting this world is.
Hero? Savior?
No, I just want to be the mastermind behind the scenes who controls the female lead.
[Friendly Reminder: The protagonist of this book is loyal to his own desires; those with a saintly heart should avoid this!]