Well.. I've got this idea of a manga... it is likely based on those emotional roller coasters like Clannad and Kanon...
Before I start.. I myself am not good at expanding stories but I can do such plots that I think would be interesting...

Characters:

• Nikagami Keitaro(15)- 1st year highschool student, he is the main male protagonist of the story.
• Mayumura Ayame (16) - 1st year highschool student, she is the first main female protagonist of the story.
• Yoshihime Katsura (17)- 2nd year highschool student, she is the second main female protagonist of the story.

... any other characters aren't that vital so inclusion of their names would just waste the space. So here we go..

Basically I envision this as a non typical, harem, tragedy love story with some comical reliefs. The story revolves around Keitaro who just got admitted in highschool after being adopted by her only family her aunt with her 1st cousin. As for Keitaro, he is shy, reserved and unsociable upon entering school. Growing up alone he decided to rely on his own strength to protect himself so he studied swordfighting unorthodoxly. another of his special trait would be his ability to copy others almost instantaneously and perfectly may it be their sport or form in kendo. The story starts of with Keitaro transfering and meeting Katsura, his sempai and getting to know her on a typical start of the semester. Also, he meets up with his classmate Ayame who encourages him to join the kendo club to improve his self confidence and gain some friends. Well, it implies that both the female protagonists fell in love with him at first sight and develops all through out the story. (TBC)