mumei asking if she can join you and kronii during sex everyday
you saying no
mumei turning into a brat
you finally accepting her request
after being a bratty tease for months she becomes shy and loveydovey after you include her
realizing she just didn't want to be left out
you making love to kronii while intentionally leaving mumei to shlick on her own
mumei timidly asking you when it's her turn
you telling her to be patient
you cumming inside of kronii and going to sleep
mumei, still rubbing herself, tapping your turned shoulder
mumei asking kronii if they can do something after you ignore her
kronii going to sleep as well
mumei lying on the outside corner of your bed, naked and crying