Series: Maricha's great adventure ！(kazukki)

http://www.pixiv.net/member_illust.php?mode=medium&illust_id=60079690
http://www.pixiv.net/member_illust.php?mode=medium&illust_id=60154768
https://www.pixiv.net/member_illust.php?mode=medium&illust_id=60423935
https://www.pixiv.net/member_illust.php?mode=medium&illust_id=60423963

original title: まりちゃのだいぼうけんっ！