Kunikida had felt for years he was going mad. From the first time he discovered his ability, it was the beginning of a spiral. The Agency and Fukuzawa slowed the spiral, but he never quite felt that it would stop. Perhaps the ADA just provided him with an acceptable outlet.
That was until he came to know Dazai. Dazai was spiraling too, clinging to any semblance of stability just as much as Kunikida. Maybe they were both destined to fall, but at least the pit of loneliness no longer sat heavy in his heart.
And most days that was enough.