After four years, Girls' Generation finally reunited on tvN's "You Quiz on the Block" on Wednesday, Sept. 1. Here, Taeyeon, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, YoonA and Seohyun hinted at the possible return of the girl group in the spotlight.

It was the first time in four years that Girls' Generation was seen on a show complete. Though they often see each other in real life to hang out, it is quite hard to get them together in one show.

Thanks to Sooyoung and Tiffany, these two convinced the other members to appear on the show as a whole group, Soompi noted. As their 15th anniversary is still a year away, Yuri asked why they have to do something big for their 14th?

But when she learned it was a guesting on "You Quiz," she quickly agreed to go. YoonA, alternatively, revealed that they promised each other to try not to cry when they introduced themselves as Girls' Generation when they talked the night before.

Later, the group talked about different topics, from feeling an age difference with today's newer artists to recalling the busiest times when they were doing promotions as a group. However, the most-awaited question was when host Jo Se Ho asked them about the possible comeback of the group.

YoonA replied with a simple smile and said they always said they were "open to it." Yoo Jae Suk, in addition, explained that since it would be their 15th anniversary next year, it might be the perfect time for them to do something together.

"Next year, when it's our 15th anniversary," she said. Sunny, then, chimed in and agreed to Yoo Jae Suk, suggesting they should do it now.

Meanwhile, Taeyeon confessed that she once tried to run away as a trainee after experiencing difficulty in losing weight. According to AllKpop, she almost considered giving up after finding "dieting was so difficult."

At the time, she admitted to being chubbier than others and she was told she had to be skinny, too. However, it did not come easy.

This made Taeyeon angry and frustrated, so she decided to go back home. Seohyun agreed, revealing the hardships during the beginning of their debut days.

Their managers did not let them eat because they had to reduce weight. So, to treat themselves, the Girls Generation girls' revealed they used to hide chocolates and eat them without their managers knowing.