I'll be your Yumeji, Ringo onee-san.
Surprised they didn't hear Chieri sneak up or notice the moving tree branches she clumsily tried to use as cover. Don't let your dreams just be dreams, girl. Go get him!
If she isn't getting back to normal size at the end, another narrative solution to their... "little" problem as future lovers could be somehow getting Yumeji to grow to her size instead. The department will be very busy designing a lot of things for guys this time.
That begs the question, if two 8m giants have children... will their kids be normal-sized or giant sized?