It is rather a spoilish thing, view at your own will(Drag on)
When Kenshiro decided to leave Bart and Lin be(Even when their relation is broken), he saw an image of Yuria crying on the rainy sky. Just then, his seven marks shone bright light, obviously triggered some sort of memory lapsing acupuncture. Yea, I know it is cheesy, but when you see acupuncture as freaky as "Hit-you-to-sleep-then-you-will-love-the-first-man-you-see-next.", it is far from bizarre...
If anything, the animation tends to be the lite version, which kind of reduces most unnecessary deaths found in the manga. For example the brothers who Jagi tortured.