# Research Report on Gluttonous Expansion
## Introduction
Succubus store the energy absorbed during feeding (soul energy) in their bodies and digest it to obtain usable energy such as magic power. Although their body shape changes slightly during feeding, it is different from the gluttonous expansion described later.
## Phenomenon of Gluttonous Expansion
Gluttonous expansion observed during the feeding of lower-class succubus is a phenomenon where the body swells significantly because it absorbs more soul energy than necessary, indulging in the pleasure of feeding, and the body cannot withstand the concentration of energy.
## Health Effects
Generally, succubus absorb a small to moderate amount of soul energy from their prey, causing the prey to develop a special sexual dependency (becoming a thrall), which allows the succubus to hide its existence while obtaining a stable energy source. In this case, the prey does not suffer direct health damage (though changes such as deviating from sexual orientation may occur). However, if excessive soul energy is absorbed to the point of causing gluttonous expansion, the prey will fall into a severe state of debilitation and die within a few days if not treated.
Additionally, the swelling of the body due to gluttony causes a decline in motor functions and takes time (2-3 days?) to digest.
## Effects on Succubus
As such, succubus are thought to generally avoid gluttonous expansion because it results in the loss of a nutritional source and disadvantages such as a decline in motor functions. In fact, cases where excessive soul energy absorption has led to debilitation or death are very few compared to the number of thrall victims.
However, because the swelling is accompanied by intense sexual pleasure, it has a strong dependency, and some individuals are said to intentionally repeat gluttonous expansion seeking this pleasure. In fact, deaths believed to be caused by excessive soul energy absorption tend to cluster in specific periods, and there are cases where multiple people have been hospitalized consecutively before and after these periods, complaining of sudden unexplained debilitation and muscle loss.
## Phenomenon Unique to Lower-Class Succubus
There are several reasons why gluttonous expansion is considered a phenomenon unique to lower-class succubus. First, there is a limit to the amount of energy that succubus can convert (digest) at one time, and lower-class succubus are particularly prone to gluttonous expansion because their conversion efficiency is significantly inferior to that of middle and upper-class succubus. Additionally, lower-class succubus can only absorb soul energy through physical intercourse, and it is suggested that the pleasure of this intercourse lowers their judgment ability and makes them more obedient to their desires.
## Illegal Summoning and Its Effects
Furthermore, because excessive soul energy absorption is said to provide intense pleasure to the prey, there are always those who attempt illegal lower-class succubus summoning magic and rituals for this purpose, and deaths have been reported.
Even if the summoning is successful, the prey is usually turned into a thrall, and whether or not they become a thrall, their memory does not remain due to the succubus’s aphrodisiac effect.
However, it is possible to record the feeding process on video, and such videos sometimes circulate. Among them, videos recording gluttonous expansion are traded at very high prices among enthusiasts. Although these videos are illegal under the “Prohibition of Production and Possession of Spirit, Demon, Monster, and Ghost Pornography,” they are essential for research and countermeasures against the increasingly serious succubus damage in recent years, and their pros and cons are still a subject of debate.
## Conclusion
Gluttonous expansion is a phenomenon unique to lower-class succubus and has significant impacts on both the prey and the succubus themselves. Including issues related to illegal summoning and its recordings, further research and countermeasures are required in the future.
