The tentacle story could be improved by soooo much in so many ways, that i just had to feedback this stuff.
Here are some small ideas that could evolve the story:
[*]more more and more people to interact with
[*]more places to interact with
[*]a money system
[*]a level up system
[*]customization within the game by means of shops, money, monster, girls, etc
[*]the player has a risk to get killed, raped to even have a parasitic problem with the monster
[*]the player can be effected or mind controlled by the monster, where he does things against its will or loses track of time to find out he did certain things...
[*]the player can be improved to even evolve because of the monster
[*]he might get into trouble because of his monster/adventures (police, army, girls, man, etc).
Tentacle monster related:
[*]can be trained, fed food, fed something to have sex with
[*]can be milked for its sperm
[*]has emotions or states that could get the player into trouble
Tentacle monster sperm related:
[*]effects are limited when the monster is just a baby and gets more powerful when it matures
[*]sperm could be used in a different way to control people to do certain things for the player
[*]sperm could be used to effect the outcome of certain scenarios, that usually fails or ends bad in normal circumstances.
[*]sperm could effect man #mindcontrol
Anyways... lots of room for improvement, so i stop this useless feedback and give my imagination a break
*Wished I could help you guys develop this thing.