Shinobu Kokoro wa

The Ninja: A stealth fighter expertly trained in ancient Japanese martial arts. With his fiery combination of sheer force, considerable guile and devastating proficiency, no man can resist his skill! Follow the sizzling sessions with a young, innocent ninja-in-training as his master teaches him the secret methods of the clan...with a little hands-on instruction! Meanwhile, two experienced shinobi take their relationship to new heights when a tragic separation leaves one of them caught between a rock and hard place. Filled with over-the-top "action," boys in tight uniforms, and one very lascivious snow spirit, this romantic fantasy collection is one part passion, one part affection, and all heart. (Source: Blu manga)