MUDR-376 After-School Training Club ~The Masochistic Volunteer Who Craves Being Bound~ Natsume Usui

Title ID

MUDR-376 (Distribution ID: mudr00376)

Starring

Genre Tags

Schoolgirl, Solo, Creampie, Bondage/Shibari, SM, Humiliation. Label and genre tags: Muku.

Core Concept

Amidst a dull school life, she engages in a forbidden act at school; the next day, a mysterious letter appears in her desk, kicking off the after-school "Training Club" sessions. The key selling point is that she isn't dragged in against her will; instead, she actively requests the bondage and training. Official listed elements include bondage, humiliation, training, servitude, and multi-person scenes.

MUDR-376 A1

Plot Outline

The official synopsis is brief. Natsume leads an unexciting student life; seeking a thrill, she goes to school without panties and masturbates, believing no one is watching. The next day, she finds a mysterious letter in her desk. The story moves quickly past daily life and straight into the after-school club activities: rope bondage, humiliation, and demands for servitude, culminating in her own verbal request for the training to continue. The film runs for approximately two hours as a continuous narrative rather than a compilation of clips. Regarding character relationships, the official description does not specify the letter's sender, focusing instead on the fact that she ultimately desires this training herself. MUDR-376 A2

MUDR-376 A3

I won't go into detail about the specific bondage/training scenes within the "student" scenario. Instead, I’ll outline the highlights based on the film's structure, skipping the play-by-play process.

MUDR-376 A4

Key Highlights

A "debut" release—not a re-edit of old footage

This marks the debut of Natsume Usui in hardcore SM bondage; it is not a "Best Of" compilation. The rope work and training elements are new territory for her here. If you want to explore this side of her work, this is the perfect entry point—no need to catch up on previous compilations first.

MUDR-376 A5

The letter is the trigger; her initiative defines the second half

The first half uses a forbidden act and a letter to lure her into the club. The focus of the second half is her own plea to participate. The real draw is the progression: she is discovered first, then she speaks up, rather than simply being forced through the motions from start to finish. MUDR-376 A6

A two-hour solo feature with a consistent theme and no cast changes.

It focuses entirely on Natsume Usui. The content includes bondage, humiliation, and servitude; the narrative flows continuously along a single arc without the pacing being disrupted by switching actresses. The two-hour runtime is best suited for a full, uninterrupted viewing rather than skipping through it as background noise.

Summary and Access

Key details regarding the title: Solo feature, "innocent/pure" persona, released around May 15, 2026, part of the "Training-Seeking Masochism" (Chōkyō Shigan Masochism) series, with a runtime of approximately 120 minutes. The official version is available on FANZA; search by product code MUDR-376 or mudr00376. I won't go into detail here about the scenes featuring the student persona.

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MUDR-376 After-School Training Club ~The Masochistic Volunteer Who Craves Being Bound~ Natsume Usui

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