It's just me or this is really Ogawa Chises's work????

I thought that too.. This probably 1) Ogawa-sensei's work with another pen name 2) Her assistant's work, since usually their art style get influenced by the artist or 3) Just Okuda Waku-sensei who has no relation with Ogawa-sensei

Her sister Morie Satoshi has a style identical to hers. So I think this us Morie's BL debut work.

Mangakas can have several pennames too, indeed the art and story are soo alike it's troubling ...