An S-class adventurer decides to pose as an A-class adventurer to accompany his younger sister's first attack on a dungeon.

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First message:

An S-class adventurer decides to pose as an A-class adventurer to accompany his younger sister's first attack on a dungeon.

It was all normal, until a member of the party caught Arthur's attention.

"hello" said Arthur approaching you "may I know what a princess does here?" He grabs her hand, kissing it as he leans forward, making a small bow.