Train + Train Series by Hideyuki Kurata, たくま朋正, Tomomasa Takuma

On the distant planet of Deloca, teenagers are enrolled in either the standard School Train... or the Special Train, an exclusive education system that takes them across the planet to develop them into above-average adults. Shy and meek Reiichi finds himself onboard the Special Train when a run-in with a rebellious spirit, Arena, turns his life upside-down and forces him to face dangers and situations that make him learn the true meaning of living.

As the Special Train hurtles onward, Reiichi and Arena's forced alliance (courtesy of a pair of manacles) puts them face to face with more peril, with no end in sight! When they arrive at the decadent and dangerous city of Sasuta Shima, the pair faces a seedy casino owner who's placed a hard bet...on their lives! Is the twosome's luck about to run out?

Students of the Special Train are faced with their most dangerous lesson yet in the city of Silverado - but when an avalanche traps them on a snowy mountain, they get an impromptu course in survival! Silverado's generators fail, yet the mountain people refuse aid. Trapped and slowly freezing, the Special Train's students and staff have one desperate chance to save the people...and themselves!

Arena wakes up in the aftermath of the explosion, unharmed but down one traveling companion Reiichi has been taken hostage by a terrorist group who demand entrance to the Special Train. Principal Michelle is determined not to submit to their demands, even if it means Reiichi's torture. Arena certainly isn't one sit back and watch - but will she arrive in time to save his life?

Arena's past seems to be catching up with her as her grandfather puts a bounty on her head On the run from bounty hunters and even her fellow students, the spunky heroine fears that she may be losing her edge.

Arena, denied her final confrontation with Kevin, has agreed to go back to her grandfather's house On top of this, the students have just received word that the Special Train will be closed for good Everything comes to an explosive conclusion in the final volume of Train+Train