You could also check on social media platforms. There might be fan pages or groups dedicated to 'ulala session' where fans share and discuss things related to the band, including the lyrics of 'love fiction'. Additionally, YouTube music videos of the song may have the lyrics in the description or as captions, which can be a convenient way to access them.
Sorry, I'm not very familiar with the specific 'ulala session love fiction' song lyrics. You can try to search for it on music platforms where you might find detailed lyrics explanations.
Since we don't have the full story, it's hard to say exactly who Suzy Perez is. She might be a character that represents a certain group of people. For example, if the story is about immigrants, she could be an immigrant herself, facing the typical challenges and joys that come with starting a new life in a different place. Or if it's a story set in a school, she could be a student, a teacher, or someone related to the school in a unique way.
I'm not sure where you can specifically find it. You could try searching on major music platforms like Spotify, Apple Music, or YouTube. Maybe search for it using the full name 'lagu ost new gisaeng story' and see if it pops up.
I'm not entirely sure what 'lirik' specifically means in this context. It could be a misspelling of 'lyric'. If it's 'lyric with you my first story', it might be about a personal story that is shared through lyrics, perhaps a songwriting experience where the first story is being told in the form of lyrics to someone special.
It could be from an amateur songwriter who is just starting to express their personal experiences. Maybe it's a very personal and unique phrase they came up with for a song they are working on.
As far as public knowledge goes, they are just colleagues. They have acted in some projects together which made their fans hope for a love story, but in reality, there is no indication of a true love affair between Bae Suzy and Kim Soo - hyun. They are both focused on their individual acting careers.
As far as I know, there's no factual love story between Bae Suzy and Lee Min Ho. Although they are both popular actors in South Korea and might have worked together or been in the same events, there is no evidence to suggest a romantic relationship. They each have their own separate careers and personal lives.
I'm not sure which specific 'suzy fanfic' is good as there are many out there. But you can try looking on some fanfiction platforms like Archive of Our Own. They usually have a wide variety of fanfics about different topics and characters.