Sign-In in Demon Slayer, Starting by Stealing Daki's Prey

Edo, the eighth year of the Tenmei era, 1788 AD. When Izumi Kiyokazu stood in this pleasure-seeking hell called Yoshiwara, the voice of fate finally echoed in his mind.

Sign-in location: The pleasure quarter.

Sign-in reward: Sun Breathing.

But before he had the chance to practice the technique, he fainted from exhaustion. Just before he passed out, he spotted a woman with silver hair and blue eyes at the edge of his vision.