Honestly, it may not be a happy ending since she's still suffering from it, but at least one aspect of the suffering (the shame and self-loathing) is gone. Just that is already great in it of itself! Glad she can find something to be happy about still
Hopefully she isn't actually hunting her... After all, it could be a red herring. I'll hope for now.
Turns out Sayuri really did like Ota-kun... Well, it be like that I guess. I wonder where we'll go from here?