I wonder if there could be a new series which takes place after the original series. The main character of this series is Yuske Yamada, a 17-year old high school student who early on had developed like an older brother bond with Jin Takumi. At one later point, Yuske made a promise to protect his 14-year old sister Yuko Yamada. At one point in the series, the kid surrouned with blue butterflies, manipulates both Jin and a friend of his: Hayate Kohaku. Eventually, Yuske and Jin engage in a climactic showdown, a friendship in flames. Yuske told Yuko to not get involved as he doesn't want her to get hurt. After the battle ended in an explosion, a dazed Yuske recovers and takes out his spike and begins to hunt down Jin. When he finds him, he strikes and Jin disarms him and slams his head to the rusted car, stunning Yuske. Jin then takes out his knife and stabs Yuske in the chest and Yuske screams in agony before passing out briefly. When he opens his eyes, he see Jin loading a bullet in his gun and taling to him. When Yuske says "Big Brother" Jin replies "I know you understand." Yuko then tackles Jin, causing the shot to miss and both get into a fight. Yuko kicks the gun off of Jin's hand and Yuske crawls toward it. Just before he could grab it, Jin kicks it away and stomps Yuske. Jin and Yuko continue to fight, with Jin slowly gaining the upper hand. Desparate to save his sister, Yuske grasps the knife and begins to pull. As the fight goes on, Yuske pulls with all his strength, even using both hands, and manages to pull the knife out of his chest. He then throws it at Jin, who looks up at him. The knife pierces Jin's forehead, destroying the jewel embeded in him and killing him. Hayate was watching, seeing Jin's death and he realized the error in his ways. That was in the epidose "I Will Always Protect You, No Matter the Cost" In the final episode, "A Revenger's Tragedy to The End" Hayate returns to that kid and turns on him and attacks. After a struggle, he manages to subdue him and mortally wound him and critisize him of his manipulative nature and how what he's done resulted in the death of Jin. When he asks "Any last requests?" and the kid says "Yes, can you finish what you started?" and Hayate replies "You're an smart aleck [a--hole] to the end!" before finally killing him with a stomp to the head, causing all the butterflies to die. Government troops arrive, with guns aiming at Hayate, ready to fire. Hayate surprises them by surrendering without a fight and asks if he could see Yuske.