Let's examine the "docking" in more detail.
Basically, two possibilities:
1) Red/Blue and Green/Yellow only. Result depends on who's on top.
2) Red (Akane) as the MC docks with all the girls
This wouldn't cheapen anything imo. She could kiss every girl in a different spot
Anyway, fanservice-wise, this is all still very tame, especially if it's compared to Strike Witches.
If it had been me, i'd said: "Activate fusion by grabbing the other girl's breats from behind!" XD
Finally, here's something that no one has mentioned so far: What if they eventually do a super-fusion with three or even four girls?
This could only work with option 2) from above. Akane could then kiss the three other girls, one after another, and then - Yuri orgy!
