Rest

Rest points
Rest can be done at specific places (usually it would be beds), represented by (❤︎) mark.

Resting at a rest point would mark it as a checkpoint, allowing Lust Doll to respawn here after passing out (unless zone's entrance wasn't set as checkpoint instead).

Almost all zones have at least one resting point available.

Abandoned Town: New Ark: Transylvania: Milk Farm: After freeing the farm, Lust Doll may rest here for free.
 * Ruined Lab (initially available, but may randomly result in anal rape from Slime Monster if going to sleep with door unlocked)
 * Cassie's safehouse
 * Hobo in the Slums may provide you a place to rest for small fee of 5
 * Underground Mall has Restful Sleep capsule hotel, where Lust Doll may rest for a fee of 100.
 * Condo:
 * After buying room at Condo for 2000, Lust Doll may rest here whenever they want.
 * After finishing Fawn's route, Lust Doll may replace the old condo with double condo for free.
 * Succubus Tower: Free resting point at the third floor. Lust Doll would be randomly molested while here, resulting in raising lust to 100%, unless Rinny is present as companion.
 * Inn: Becomes available after finishing Manor quest.
 * Pixie's Lair in the Graveyard may be used for rest after meeting her.
 * After finishing Manor quest, Lust Doll may rest in Manor for free.

Gameplay effects
Rest restores stamina and mana to maximum, but wouldn't drop lust. However, most resting points also provide ability to relief yourself, excluding some public ones (including resting point in Succubus Tower).

Rest removes any positive buffs, but wouldn't remove most other status effects (excluding those caused by sleep deprivation).

Certain events use rest as a trigger point, either advancing to the next stage after resting, or (if repeatable) becoming inactive after activation until Lust Doll rests (for example, Class at Succubus Tower).

Sleep deprivation
As anti-grind mechanism (absent in classic game), Lust Doll+ makes Lust Doll progressively more sleepy if they avoid sleeping for too long, which provides serious debuffs to all stats.