Heart to Hearbeat

What is it about
Heart to Heartbeat is a Doki Doki Literature Club story that's about an OC (Aaron Thompson) gets dropped into that world to change it but not by code, by physical action.

Plot (Spoilers on the way)
Our main character Aaron is dropped into the world of Doki Doki Literature Club to basically change everything, though his mere existence has changed some things. Such as how the world works (meaning it's no longer a game with save states) thus making Monika's powers basically unusable though she does remember it was a game. He has done plenty of things that really helped people, like feeding Natsuki, stopping Yuri's self harming problem, and even helping Sayori with her depression (dating her soon after).

Later events include Aaron basically helping Natsuki with her father after he murdered someone, even fighting him with the possibility of being killed. Afterward, winning and saving the day.

What happened after
After the events, life was peaceful, Aaron got married and had a kid with Sayori and has Natsuki still living with them (implying she's now family to Aaron and Sayori) with the implication that they still keep contact with Monika and Yuri after all this time.

Fun facts

 * This was the creators first 'finished' Fanfiction
 * Aaron's later incarnations do remember this moment if they can
 * It's implied here that Aaron does carry that superhuman intelligence and strength considering that he can take on a fully grown adult alone without being seriously injured
 * This is where the Aaron as an OC was developed a bit with other stories building upon his personality