Manga by author Abe Miyuki - Status ongoing

From September scanlations: 17-year-old Kaidou Haru isn't too happy to be spending his summer vacation in the wilds of Canada with his eccentric, estranged mother, but when she saddles him with civilizing his new adopted brother, 8-year-old wild child Ren, he takes up the mantle with aplomb, gradually learning to navigate the boy's unruly demeanor and fostering a close bond that prompts him to invite Ren to come live with him in Japan once he graduates, hoping Ren can experience what it's like to have a real family. But falls from such heights of happiness usually give way to the deepest depths of despair

Five years ago, all but one of the inhabitants of Ootsuka village perished due to the plague...but the lone survivor wished only to follow her two dear friends to the grave.To prevent the death of the people who were like family to him, one of the dying boys used his last remaining breath to agree to a proposal put to him by a mysterious fair-haired man. Miraculously restored to health, the trio have since sought refuge in a church near the adjoining village.Eventually, the Imperial Church begins to express its interest in possessing 'Murasame', the demon blade rumored to 'contain life'...but what connection does this legendary sword have with the three survivors of that devastating epidemic?

From Peccatore Sanctuary:The cheerful and open high school freshman, Nakazato Haruka has fallen in love! With his classmate - basketball's club Tajima Kaoru. Haruka started his fierce attacks, and also declared "You will like me for sure!" How will the cool and quiet Kaoru react after knowing about Haruka's feelings?