Stray Kids' Seungmin and I.N get along well because they both have excessive online shopping habits.

The pair revealed their penchant for buying shoes using an online shopping app when they appeared on the latest episode of Stray Kids YouTube series "2 Kids Room."

Seungmin and I.N belong to the so-called "maknae line" – a term given to the youngest members of K-pop groups. The singers maintain a close relationship as they share a dorm with two other members, Felix and Lee know. But more than just being dorm mates, the duo click perfectly because they prefer shopping online.

"Offline shopping is bothersome. It makes you feel like you have to try them all on," Seungmin said in the episode released earlier this week. "Online, you don't think that way. You just look at it and if it’s pretty, you buy it."

I.N then revealed an important promise Seungmin had made but failed to fulfill.

He said the 21-year-old K-pop star promised not to buy any more shoes until September but bought a new pair just recently.

In his defense, Seungmin said, "They were practice shoes!" before admitting that he should delete the shopping app.

He also got back at I.N, saying, "I bought a pair because I had no practice shoes but this guy went crazy and bought two pairs."

"2 Kids Room" is a web series that began in 2018 with the aim of introducing Stray Kids members to fans. Members are selected in pairs and they have to share anecdotes about their relationships with other members and their experiences in the industry.

In the latest episode, band leader Bang Chan said he found it unbelievable that I.N had 16 pairs of shoes. But Chang Bin and Lee Know said owning many pairs of shoes was not unusual for celebrities.

"It's us who have too little," Lee told Chan, who replied, "Do you know I only have five pairs of shoes…I don't want to choose."

Stray Kids' latest music video, "Maniac," has surpassed 100 million views on YouTube this week. The boy band members are also preparing for their North American tour, which will begin from Seattle on July 14 and 15.

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South Korean Boy band Stray Kids Johnny Louis/Getty Images