A young boy who came down from the Surface's sewer.
His name is Tad.
His slug, whose name Pieper, helped him to find the way to Slugterra.
Upon finding the Shane's secret passage way that will lead to the world of Slugterra.
When Tad falls down the Drop and finally arrives Slugterra at last.
After Tad and Pieper arrived Slugterra, they met Eas, the dark half of Wen Jing.
Eas tells him that he will take over Slugterra if they work together.
She place dark magic in Tad's necklace to prevent from bonding with Khai, who is the Princess of Marinatopia.
After meeting with Eas, Tad and Pieper meets the Shane Gang, Khai, and Wen Jing.
Then, a blooming happen when he meets the Flower Fairy: Kotoha Hanami.
Or just call her Ha-Chan.
Tad is suddenly admiring her beauty as a flower.
They both quickly bond each other and become so close.
Ha-Chan likes to call Tad as Taddy as his nickname, which made him blush furiously.
Then, Eli trains Tad on how to catch and befriended with slugs.
Tad could not shake off the feelings for Ha-Chan as he is still admiring her beauty.
Thus, causing dark magic within his necklace to overwhelm by the love.
Slowly, days passed…
Tad and Ha-Chan bonding together because of their relationship.
Tad then made a promise that he will protect and never hurt Ha-Chan as long they are together.
Ha-Chan was happy at Tad's promise.
Until one day…
Tad suddenly disappear.
Ha-Chan began to worry of where he went and hoping he returns.
Then, the news informed about the disappearance of all Slugs in The 99 Caverns.
The heroes then receive an emergency message from Dr. Schnee, whose formerly name Dr. Blakk.
The Shane Gang and the others head to Dr. Schnee's HQ to help.
To their shock…
Tad was behind all the disappearance of all Slugs!
But he isn't alone…
He has allies: the Scrap Force, Eas and Klyn Hallewell, a mysterious man who possessed dark magic.
Ha-Chan's heart is broken and their promise breaks when Tad revealed his true colors.
As the battle heats up…
Tad, first time, hurt Ha-Chan and injured her head.
Upon to this…
Tad is overwhelmed with shock, horror, and dread…
He realized what he has done…
Then, Eas revealed the truth that she was actually using him along.
As Eas about to kill Tad, Ha-Chan took the final blow as she sacrificed herself to save Tad's life.
Everyone is shocked to see her sacrifice, including Tad.
Tad's emotions becomes unstable as he breaks down to tears.
Then, suddenly reveals the truth about how much he loves her.
Thus, cause his necklace that was placed by Eas with dark magic to be shatter into pieces as the dark spell is broken by his true love for Ha-Chan.
Much to Eas' shock to see her dark spell has broken.
Then, Ha-Chan gains her Enchantix, because her sacrifice made her to gain a new fairy form.
But everything's started grow dark and dark as Klyn reveal his true purpose: turn Slugterra into his will.
Klyn revealed that he pretend to work with his allies.
He forced Eas to kill herself by cut her own throat and uleashed his dangerous magic, and revealed his true form, the Grim Reaper.
Khai reveals that Tad was placed a curse by her magical pendant because he betrayed his team and thus, summon one of Khai's ancestors' arch-enemy to their present timeline.
In a heated, final battle with Klyn.
Tad took the final death blow from Klyn's attack to save Ha-Chan's life.
His sacrifice brought the Curse of Klyn Hallewell to the end.
Filling with grief and guilt the loss of Tad...
Ha-Chan brought him back to life thanks to her new life magic.
When the heroes comfort Tad and Pieper, they knew they're going to punish them for the actions.
However, the heroes forgive them and the Princess of Marinatopia give them a second chance to learn about their mistakes.
And then, Tad pleaded Ha-Chan for forgiveness for hurting and breaking the promise.
Ha-Chan forgives him and their relationship is restore, along with love for each other.
A Human and a Flower Fairy's love is fill with floral love.
They made their first time romantic kiss as their love cannot be break as their love is powerful.