Wholesome Brother moments of Nagito Komaeda and Kokichi Oma

Whats with the purple Panta?

Hajime often sees Nagito buying Panta. But Nagito's favorite drink was Sir. Salt. That just didn't add up. Hajime has wondered about the mystery of the Purple Panta, ever since he first saw him buy it. One day, Hajime meets up with the ultimate detective, Shuichi Saihara. They meet at a coffee shop, where they talk about abnormalities. One day Hajime finally brings this up to Shuichi.
"Yeah, there's something strange going on with my friend..."
"Hmm? Whatever could you mean Hajime?"
"Well, it may be nit-picking, but my friend Nagito always buys purple Panta."
"Any what's strange about that?"
"Well for one, he never buys things for himself, two I never see him cruelly drink it, and three, Nagito's favorite drink is Sir. Salt!"
"..."
"..."
"That is kind of strange."

After Hajime's weekly talk with Shuichi, Hajime was invited over to Nagito's.

"Hey Nagito, can I ask you a question?" Hajime
asks. "Of course, what is it Hajime?" Nagito replied, unlocking the door with his keys. "Well, I find it weird how you always but purple Panta. Is it your new favorite drink or..." Hajime finally asks. Nagito laughs. "You'll see." Nagito simply said. When Nagito opened the door, inside was a short purple haired boy, grabbing a Panta from the fridge. The boy turned around, revealing himself to be Kokichi Oma.

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