Attack on titan: The journey of the anomaly

In a dark room somewhere, a boy seemingly in his 20s could be seen lying down on a bed with a huge TV infront of him that is seemingly showing an animations of a girl holding her red scarf as she was saying her thanks to a certain someone for wrapping his scarf to her

After she said that the credits showed up as the man turned off the huge TV as he showed an amused expression

"Haha... What a masterpiece of a story this is, a story of a guy who yearned for freedom but decided to sacrifice his freedom for other in the end huh..." The boy said in an amused tone

As he cleaned himself up and went to bed he thought before he fell asleep

'If I were in that world, would I be able to change things into my liking?'

And so starts another story