@manny16 Yeah the Gardening club is basically described as Rebecca's personal harem in the novel, but thankfully Rebecca herself breaks the overused cliche of the man hating lesbian that is too common in these types of novels and she's instead a very kind and open individual that accepts the MC...
So many people keep saying it's incest but it's not. Just to clarify the two 'sisters' aren't even his real sisters they are just youkai posing as human so it's not incest unless the Author decides to add the mom as part of the harem