The very next panel shows Ruka reaching to embrace Kazuki. Far from doing nothing and waiting for it to pass, she ultimately chooses Kazuki. If you notice the ages on the portraits, they continue their relationship for at least 11 years. Whether they reunite every five years or carry on in secret the whole time is for the reader to decide.Toxic yuri...I prefer the other oneshot (https://mangadex.org/title/e75e1f76-2571-4986-bd3d-551244312c05/majo-to-watashi) about friendship.
The last panel we saw the face of Ruka, her expression of defeat, for me, also stages a rape scene. Her laying down, doing nothing, wanting for it to pass....I'm not a fan.