When Tsunade heard Shin Uchiha's words, she asked curiously, "A space mark?"
Shin Uchiha had to explain what the space mark did, leaving Tsunade stunned once again. She had never imagined that he would be such a treasure trove of surprises. His space-time dōjutsu not only gave him a private retreat where people could live, but also allowed him to place space marks on others. Although those marks did not grant them Space-Time Ninjutsu, they could still save their lives at a critical moment.
Tsunade thought it over carefully, and her pretty face flushed despite herself. Finally, under Shin Uchiha's puzzled gaze, she hesitantly pointed to her chest, at the spot between its two towering peaks. Although it was a rather sensitive location, it was indeed second only to the point between her eyebrows. Embarrassed as she was, Tsunade knew that sometimes, even that tiny difference in speed could mean escaping with her life. (The Shanzhong acupoint, the Shanzhong acupoint. Get your mind out of the gutter.)
Following Tsunade's finger, Shin Uchiha saw the spot she had chosen, and his gaze involuntarily sank into her cleavage. The corner of his mouth twitched as well. To avoid making Tsunade lash out in embarrassment, he said nothing and simply activated his eternal Mangekyō Sharingan, placing the space mark there. Fortunately, her neckline was fairly low, or it would have been difficult.
Shin Uchiha concentrated and carefully placed the space mark there, then breathed a sigh of relief. Marking a person's body was already troublesome enough, let alone somewhere so important. Wasn't this tempting me to commit a crime? Is this how you test an official's resolve?
Once Shin Uchiha had finished placing the space mark, Tsunade tugged her clothes closed in a futile attempt to cover her embarrassment and turned away. "Let's