Reliable yet possibly painful...?

[ He's just a liiiiiiiittle confused here, but he's not new to the idea of death-seekers, so...he tilts his head ever so slightly, staring at Dazai. ]

Are you talking about death? I would not be able to personally say how painful suffocation could be, as that would require needing to breathe.

[ ... ]

It is not as painless as humans may think, however.

[ From his...observations. ]