6years
Sam had randomly disappeared after she graduated her highschool.Never once interacted with her friends or Mon,for whom Sam had feelings for.only to return 6 years later Infront of Mon's house asking if she is too late.
Mon and Sam were very close in highschool after Sam had saved her once when they were both kids.As they got older their feelings for each other also increased and they both knew about it.When Sam was in her last year of highschool while Mon was 2Years behind Sam.Sam randomly asked Mon if she would wait for her to which Mon replied "I would for a lifetime" and that was the only confirmation Sam needed from Mon as she will do everything to stay with Mon forever.
After Sam's graduation,Sam was never seen again, Mon tried contacting her but her number/accounts were all showing unavailable.She recalled their conversation few nights ago before graduation,when Sam had sneaked Mon out of her house late night randomly and was silent the whole time which felt odd but still Mon let her be thinking she was feeling sad about graduating.
Mon was heartbroken and mad first few years eventually with the help of the trios,yuki and nop whom she met in university.Mon started focusing on her life rather then dwell on Sam's disappearance but still waited for Sam.
Mon was starting to allow herself to fall in love after years of not finding the right person,and not so suprisingly Nop confessed how he loved her but also respected her feelings to not destroy their friendship.Mon asked for some time to think about it but before she could come to a conclusion,Sam ended up showing up at her doorstep randomly one day asking if she was late after 6 years of showing no sign.
Mon was shocked but still let Sam in.Even though Mon had alot of questions about Sam and her disappearance, she was silent for a long time until she answered Sam saying she was almost late but still on time.Sam took that as a big victory and promised to gain Mon's trust.
Since then Sam had done everything to gain Mon's trust with the help of her sisters and also court her by having a competition with Nop,who can bring the best flowers for Mon early morning or drive Mon to work etc it went on for few months,It was all very overwhelming for Mon until she snapped.Sam immediately understood why and let Mon have her space.until few days later Sam shows up again Mon's house,this time Mon didn't look angry or annoyed.When Sam got in her house she started telling Mon everything about her sudden disappearance.
Mon heard her whole story out how she actually wanted to confess before her graduation, but before she could do so her grandma had kicked out Song for dating a girl.Sam felt lonely as both of her sisters left and also scared of what her grandma would do if she learns about Mon.so in order to protect Mon,Sam decided to come out to her Grandma just few days before her graduation.Her grandmother was mad and had told Sam to not show her face,which led Sam to leave the palace that night and head to Mon's place.The next day after Sam came out,the grandmother had her passport and everything ready for Sam to leave the country, and study abroad.The grandmother threatened Sam that, if she doesn't leave, or stays in touch with Mon, she will do something bad to Mon so Sam accepted it with no choice.
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After Sam graduated from university.She immediately flew back to Thailand after 4 years,and started up a company of her own called diversity.She never tried contacting Mon when she was in abroad in fear of what her grandmother would do,but now that she was here, she will try to find Mon and protect her before her grandmother can do something.After a year of opening up her own company,Sam's Grandmother pretended Sam was never gay and told her to marry Kirk,the one who told grandmother about Sam and Mon in highschool.Neung,song and ice came in the palace after years,as they heard Sam was being told to marry Kirk forcefully and called out grandmother to stop being selfish and accept Sam (she was also there) for who she is than loose her for good.Eventually grandmother came around and accepted Sam,Song,ice and also Neung before it's too late since she was going to die soon.
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After Sam revealed everything to Mon while crying. Sam was getting up to leave,so that Mon could have some more time to take in everything.but before she could leave, Mon ends up kissing Sam and the rest is history~
Extra: MonSam has 3 years age gap,Mon never asked Sam's Grandmother about Sam as she was intimidated by her energy and also powers.Mon works under Nita, Protective and Jealous Sam mode is always on whenever she sees Nop with Mon,also tries to gift Mon alot of stuff and take her out.Mon rejected Nop after Sam had came into her life again but he still didn't give up courting Mon until both Sam and Nop got into a serious fight over Mon as Nop called out on Sam returning after disappearing with no words.Nop stopped courting Mon and decided to be friends after Mon told him she won't leave again or hurt Mon and was in a relationship with her.Nita and Kirk could be made as villains.Sam also got back with the trios,who took her back as if she didn't disappeared for 6 years,as they know how her grandmother is.
Song and Neung was restricted from contacting Sam.They heard from sir phoom that the grandmother was going make Sam marry Kirk,they immediately went to the palace to help Sam,as they knew Sam was also gay and had feelings for someone in highschool before they were kicked out of the palace.after everything became well,Neung,song and ice helped Sam be with Mon again and court her.