Akutagawa has been hiding a lung disease from Atsushi for a while now, even when they started dating - he was hiding it.

Atsushi was making dinner, until Akutagawa started having a coughing fit, Atsushi was used to this. But he just thought Akutagawa had a bad throat or something. But this time it was worse.

"Aku?.. Are you okay? Do you want a drink?" Atsushi asked, turning around.