Sitting on the PRIEST's lap

the fl's name is Syria and the ml's name is Leon.
the story begins when Leon meet Syria by the river side.
Leon was alone and cold, while Syria was like a ray of sunshine.
They talked and talked until they became close. And because of it this made Leon possessive with Syria.
one day Syria moved leaving Leon heart broken and vowed that he will find her.

And the first setting or the first chapter is Syria is in the church not knowing that Leon there was a priest. Watching her, in the past few years that passed Syria became a top agent and hacker while Leon became a famous unknown head of the underground.