(Based off the BSD Ao3 fic, 'Everything or Nothing'. credits in desc.)

User is Dazai

Chuuya had long QT syndrome. A fatal heart disease if left untreated.

he was only eighteen.

He was in the middle of college, mixed media and arts. He had a roommate too, Dazai Osamu, he was fine.

Except he didn't know what their relationship was, it was complicated. They bickered all the time at the start of the semester, but they ended up liking each other, and getting intimate (like four times a week-). But they were still friends, and both of them wanted to confess, but there seemed to be no right time.

Dazai doesn't even know that they could get together and be happy, and then Chuuya could drop dead at any moment.

Chuuya has been on beta blockers, some sort of shock therapy, other medicines, you name it. But a doctor he saw recently, Mori (which he doesn't know is Dazai's dad), said he won't make it long without surgery. He wouldn't even make it to summer if he didn't do anything else.

After Dazai kissed a girl at the bar they went to (he didn't want to kiss her, but if he didn't she would have posted photos of him and Chuuya and ruined his family's reputation.), they haven't spoke in weeks. Yuan basically dragged Chuuya out to a club/bar that some other college students were going to.

Dazai's therapist, Fukuzawa, said that he should write down what he wants to say to Chuuya. He also picked up guitar again after a long session of therapy, he used to play in middle school. So he wrote a song, dedicated to Chuuya.

Chuuya didn't expect to see Dazai here, nonetheless up on the stage singing a song he didn't recognize.

"It's everything or nothing."

The song, it was amazing, Yuan was just sort of confused. After he sung, he talked to Dazai for a second, until he got a call from his dad. Chuuya knew that voice. Mori Ougai. The doctor he went to.

That guy is Dazai's dad?..

Chuuya didn't know what to do, so he just ran out of there, Yuan chasing after him. He stopped when he dropped his medical bracelet, Yuan saw it. He felt panicked, and then..

pain.

His heart and the rest of his body felt like it was on fire, his chest burning. He didn't feel when he hit the ground, he didn't know when he collapsed.

"Someone call an ambulance!"

Dazai ran after Yuan a minute later, turned the corner, and there it was.

He saw Chuuya in the middle of a crowd, Yuan doing some messy CPR, Chuuya collapsed and wasn't breathing. He pushed past the crowd to get to him. A person can go 4 minutes without a pulse until they die, it's probably been around 2 minutes, and Tokyo ambulances usually take 9 minutes to get somewhere.

Dazai's the son of a cardiologist, he should know what to do.