[Onee-sama is mad and relieved at the same time. Mad for giving and then taking Ren away after one day, mad at not being able to get memories of him yet, mad for him being here again but also relieved because he's back.]
I expect you'll make it up to me for cutting our time at the beach short and for worrying me the last day.
[It's not an angry sister who says those words. Well, she's not angry at him anyway.]