Okay, so Mind went on Num Kanchai's show as well and told her version of events.
They started to get closer during Valentines day, where he would take care of her and tell her he missed her on days when he doesn't see her and likes her a lot. He would constantly text her that he misses her and stuff like good night etc.
She knows Nychaa and has seen her at Tono's home and the soccer field. When she dropped Tono home and Nychaa came out to welcome him, he apologized to Mind saying he didn't know Nychaa would be there and that he's already distancing himself from her. He tells Mind that he finds Nychaa to be like family instead of a gf because they were together for so long, and Mind believed him. Plus, Nychaa posted some stuff on Instagram that made her believe what he said.
Tono would constantly complain about his relationship with Nychaa to her and his manager. He even told his manager in the car that he no longer loves Nychaa, and that he sees her as a sister. On March 23 when he and Nychaa were asked about marriage at a joint event, he even immediately asked Mind if she was okay, and how she felt, which made her believe his sincerity to her. In the end, she apologizes to Nychaa, her ex bf and her family for all the trouble and pain she caused.