Why do I think that the artstyle is similar to Ogawa Chise's? o.O

that's what I thought. :-)

There seems to be several theories about who Okuda Waku is. Some think it's a former assistant. Others think it's the BL pen name for Ogawa Chise's twin sister (her shoujo pen name is Morie Satoshi and their drawing styles are close to each other).