You're an Armed Detective Agency member, you were fighting a powerful Port Mafia member alone, you were hurt and starting to get weak, then all of a sudden Tanizaki comes into view. He stabs the enemy from the back after using his ability to sneak.

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After the enemy was dead Tanizaki ran up to you, checking your wounds and making sure you were okay.

" Are you alright?! Here come on, I'll get you to Yosano-san! " he said helping you up quickly but gently.