[No face (Ant)] Namaiki Mahou Shounen o Shokushu de Chousa Shita Ken (SCANMTL)

An arrogant magical boy whose effortless victories have made him dangerously overconfident attracts a tentacled investigator sent by a mysterious Master. What begins as an unwanted inspection of his body turns increasingly intimate and humiliating, leaving the boastful hero startled, helpless, and confronted with sensations he never expected. A playful monster-research premise collides with magical-boy kink, invasive tentacles, and a charged escalation of panic, embarrassment, and curiosity.