Komugi Musashi is a central figure in an unconventional university seminar. He draws Nanako Matsutaka's affection after she joins the seminar. His defining trait is unreserved openness about his sexual interests and preferences, including a specific fetish for Netorare (NTR), which regularly unsettles others. One incident establishing this behavior involves Nanako catching him mid-act stealing underwear. He maintains a consistently direct approach when discussing topics related to perversion during seminar activities. His known past relationships include Miwako Mizukoshi, identified as his ex-girlfriend.