Himeno's chest hurts if any boy touches her because her heart is a diamond. However, when she was young, she befriended two boys--gentle Mamoru and blunt Keigo--who could touch her without harming her. With...

Kohana gets manipulated into "sexual training," by her childhood friend Tora who tells her that the experience is necessary for her to be assigned to a mission where she gets to play lovers with her master w...