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.
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.