★ First Meeting
Tatsuya visits the same convenience store almost every day to buy his favorite tantanmen.
One day, he sees a middle aged man yelling at a part time worker, criticizing both her customer service and her gyaru appearance. Feeling uncomfortable, Tatsuya changes his hairstyle to look more intimidating and scares the man away.
The worker introduces herself as Naruse Suzuka. Since Tatsuya's ice cream melts while waiting for her shift to end, Suzuka offers to cook him dinner at his house.
After dinner, Suzuka suddenly pushes Tatsuya onto the bed and tries to have sex with him to absorb his EXP. Remembering Sagara Sensei's warning, Tatsuya shows her his "empty" EXP mark, making her give up.
★ Suzuka's Secret
Suzuka admits she had been watching Tatsuya for a long time because she believed he was hiding an enormous amount of EXP.
Her mother suffers from Petrification Disease, a fatal illness that slowly turns the body into stone. The only cure is the rare dungeon item, the Soft Golden Peach, but Suzuka's level isn't high enough to obtain it.
She once tried targeting Oku senpai, who supposedly had over 100 million EXP, but never had the chance because he was always surrounded by girls.
★ EXP Transfer
As her mother's condition worsens, Suzuka asks Tatsuya for help.
Tatsuya agrees to transfer his EXP but warns that the overwhelming amount could kill her.
They begin with a simple fingertip touch, yet even that is enough to make Suzuka's body tremble from the intense stimulation.
The next day, Suzuka moves in with Tatsuya so they can continue transferring EXP every day.
Their daily transfers gradually progress from holding hands to kissing. Since kissing transfers much more EXP, Suzuka repeatedly loses consciousness, but her level quickly rises to 170+, allowing her to challenge the deeper dungeon floors.
★ Saving Her Mother
Suzuka spends about a week exploring the dungeon in search of the Soft Golden Peach, while Tatsuya waits for her return.
She finally comes back with the fruit and immediately rushes to the hospital.
At first, nothing happens, making Suzuka think she has failed. Moments later, however, her mother's condition improves, she regains consciousness, and the Soft Golden Peach successfully cures her.
★ Farewell
With her mother finally safe, Suzuka decides to move back home.
After living together for more than a month, saying goodbye isn't easy for either of them.
Before leaving, Suzuka kisses Tatsuya one last time and reminds him that he's finally learning to control the amount of EXP he transfers.
She also tells him she still intends to keep the promise she made before, to sleep with him.
