Based on the fully animated game by 0verflow infamous for its violent scenes.
A shy and unconfident teenager has become very accepting at only stealing glances at a cute girl as they ride the same trolley each morning on their way to their high school. At least until Saionji Sekai surprises Itou Makoto and chances to get a peek at a photo-snap of the beautiful Katsura on his cell-phone. After evilly teasing Mokoto about his forlorn crush, Sekai offers to support him in his romance. So after many Makoto-pep-talks and lots of scheming, the three become close friends. Close enough that Makoto braves asking Katsura out on date. And she agrees. Later that day, Makoto finds a quiet moment express his thanks for all support that Sekai has offered him, and makes clear his intent on finding away to reply her kindness. But he is totally unprepared and very surprised at the reward that Sekai has chosen. Sekai steals a long kiss from his lips, before breaking away to run for the trolly. Sekai turns and wishes Makoto well on his date.