So I got that Touko was actually into Mayumi, but in a toxic yuri way instead of a fluffy yuri way like this...
So she drove Mayumi away from everyone, including her arranged marriage husband, to try to keep Mayumi to herself, but it didnt work as she had planned... Its sad, honestly, she did all that for Mayumi and she doesnt get Mayumi...
I wish in a separate universe, hadn't she manipulated Mayumi her whole life, and had actually developed and shown her feelings towards her properly, Touko couldve gotten a happy ending... I like Mayumi and Rin though