Check the walkthrough. It has a step by step guide to the events and scenes of all main characters.
Walkthrough 21.09.23 is currently the newest version. You can find it on the game page at the bottom of the download options at https://ryensaotome.itch.io/renryuu or you can download it from MEGA here: https://mega.nz/file/qh5gFKKI#VG23RC1JXksjBTctXtyaQIqJtjJwmgHXvB1YwKwooNk
I already finish the quest of mirel and kayelinth , but our relationship not full to 100 thats why i can't unlock sex scene of them . What to do ? Also sandra