This is a manga from the "Witch's Revenge" series where Princess Tiara gets tickled by aliens. This time, it's the Tickling Pregnancy Arc! In preparation for cross-species breeding with aliens, the story depicts her pregnancy while undergoing numerous ticklish procedures.

[Story So Far] Wandering aliens arrived on Earth. Their objective was to extract energy from mammalian mucous membranes and implant offspring into female individuals with healthy wombs. Unluckily, their target was the kingdom's most beautiful woman, Princess Tiara.

For Earth's mammals, the aliens' energy absorption and scientific stimulation all affect the nerves as "unbearable ticklishness." The aliens, who lack the concept of "ticklish," were confused by Tiara laughing in agony but became interested and conducted thorough reflex experiments. Full body washing, and then mating—. Yielding to the simultaneous assault of pleasure and tickling, Tiara finally accepted her fate to become the alien's wife.

Thus, although she became a treasured existence, days of rest would not come. The days of embarrassing and ticklish procedures by "Umeyo," the reproductive support unit that safely and perfectly manages everything, are about to begin...!