You've got to give Himari credit...
Spoiler for ch. 20:
...she may have lost the battle, but she's winning the war (for Yuuto, that is
).
Rinko's uneasy, but seems to have come to terms with the idea that she can be Yuuto's link to the "normal" life he wants.
Shizuku should be interesting to watch, though, now that she's starting to have doubts about her place in the harem. Is she going to pull back, or step up?