#3 RED NOSED RAINDEER

Kirito rescues a guild called the Moonlit Black Cats from a monster attack.
Drawn to the warmth of this guild, whose members are all friends even in real life, Kirito joins them, concealing the fact that he is a Beater.
With Kirito's help, the weak Black Cats gain newfound power, and set their sights on catching up to the "front-line fighters."
But one night, Sachi, the only female member of the guild, vanishes unexpectedly.
Kirito soon tracks her down, only to discover that she is terrified of dying...