Taetiseo, the first sub-unit from SNSD finally debuts, Taetiseo is comprised of Taeyeon, Tiffany and Seohyun. Taetiseo or just commonly called as TTS by their fans. TTS debuted right after SHINee ended their Sherlock promotions in Korea and are currently promoting in Japan and also in the same time as EXO-K's MAMA promotion period. Taeyeon's been a very close bestfriend to Suho, they've been friends even before SNSD debuted and it was Suho who gave a lot of encouragement to Taeyeon. Despite all of the happy moments they've been through, they are still just friends. 

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Taetiseo is on their way to Music Bank and right in front of them is EXO-K who have just arrived, Taeyeon came out of the bus first and there it was her bestfriend Suho who also went out of the van first, Suho can't help but wave at Taeyeon who was looking at him. Taeyeon who just returned from the bathroom couldn't help but hear two voices talking with each other inside a closet, Taeyeon who placed her right ear heard a familiar voice, it sounded like they were making out. Just as she was trying to pick out some more info on who the two were, the doorknob turned and the door was about to be opened, Taeyeon ran as fast as she could and when she reach TTS's shared dressing room with EXO-K, Suho and Tiffany was not there. At first she didn't speculate anything but the two came inside the dressing room with each other. Taeyeon couldn't help but think that Suho was with Tiffany.

Taeyeon has always have an emotional attachment with Suho, she really likes him but she knows that she is just a friend to Suho, afraid that they're friendship will go down the drain, Taeyeon had no other choice but to just watch as Suho grows to be a person who would definitely be in a relationship in the future. when the thought about her bestfriends be in a relationship together, she cried inside but she keeps on acting like she is happy. during the announcement of the winner, Suho decided to chat around with Taeyeon, this ended up being fans reinterpreting their close friendship as some kind of relationship and the 'Sutae' was born. Although Suho and Taeyeon laugh it all out about this topic, Taeyeon in her heart, loves the idea that she and Suho are a couple, reading through fanfictions about Sutae is a secret hobby of hers eversince that Music Bank. 

After of that week's Inkigayo, Taeyeon finally confronted herself with the fact that Suho and Tiffany are infact a couple, she saw the two walk around with each other and enter a room while holding hands, she couldn't restrain herself from eavesdropping and again, she heard the voices of two people making out with each other and even hearing Suho's voice say "Saranghae" to Tiffany. She left the scene and hid herself inside the women's bathroom, she sat there and covered with tears flowing down her cheeks, she can't help but cry, while she was crying inside one of those bathrooms, she heard a conversation between Hello Venus' Nara and Ara, even they know about Tiffany and Suho, Yoonjo who was there taking a selca of herself said 

"Unnie, i kinda support Sutae" Ara said "even if you say those things, it's not like Taeyeon sunbaenim would fight for Suho or anything i mean her competition is Tiffany, her own bandmate" and Nara said "regardless, i'm a Sutae shipper like Yoonjo".

After hearing her hoobaes talk about Suho, her head was considering of fighting for Suho but like Ara said "her bandmate" those words kept on echoing inside her head so she collected herself and came back to her senses and said "No, i'll support my Tiffany with Suho no matter what" even if she says those words with a bright smile, her heart was basically aching. she walked through the hallway and passing the room where the two were kissing, Taeyeon expecting the room to still be occupied decided to kick the door and even making a u-turn and kicking the door again, she kicked it a couple of times before Tiffany and Seohyun came out of the corner and saw her kicking the door, surprised to see Tiffany wasn't inside the room but she could still hear someone making out inside the room.

"Unnie what are you doing?" said the maknae, "Oh i'm trying to open this door, i think it's locked" and Tiffany offered to open it "No need no need come on let's go home" she dragged the two away from the room and before she left, she whispered through the door "Mianhae, i thought you were someone else, knock if you accept my apology" and to her joy, someone did knock the door and she laughed while leaving the scene. 

That night, Tiffany left the dorm to buy some soft drinks at the nearby kiosk with Jessica and Sooyoung, she left her phone and so being the curious cat that Taeyeon is, she grabbed Tiffany's phone.

it had a password lock, the old password was 'Fanyfany', so this time, Taeyeon tried one word 'Suho' and it worked, even the sound of the password being unlocked made her ache. Tiffany's wallpaper was Suho with his palm having written the name 'Fany' and heart beside it. Taeyeon went through the messages, just scrolling down the messages, she could already see Suho texting "Saranghae" multiple times, she read one or two of the text messages and she immediately wept, Seohyun who kept on calling Taeyeon from her room came into Taeyeon's room, she was there sitting on the floor beside her bed, 

"Unnie? unnie? unnie are you okay?" asked the concerned maknae

"why wouldn't i be?" said Taeyeon who walked out of the room and placing the phone back to where she found it. the phone was still unlocked so, Seohyun picked it up. 

"Seohyun-ah, do you want anything? i heard we ran out of pepsi, i'll go get some" said Taeyeon without looking back at Seohyun, Seohyun said "But..but..Unnie" and the door slams "Unnie, Fany is already buying some groceries". Taeyeon went inside the elevator, she pressed the rooftop button as she holds in all of her tears. She went outside and she through one of her friendship bracelets that Suho gave her. she cried and cried loudly, even if the rooftop was 12 floors from the ground, her crying would have been heard by every passerby. she kept on saying "Whats good of being friends if you're not for me", "You Jerk", "I hate you Kim Joonmyeon" and so many more.

She returned home empty-handed without a pepsi in her hand, Seohyun wasn't expecting her to buy a pepsi in the first place, Taeyeon rushed to her room and close the lights as she hides inside her blanket. Denying that this is reality but only a dream, a nightmare which once came to him when Joonmyeon was in a relationship with a girl Taeyeon didn't like, that girl lost Suho's interest because his bestfriend wasn't in favor of his girlfriend, Taeyeon know that it won't be the same like it did before because the girl whom Suho is with is her bestfriend, Tiffany.