Exactly, that is my point.
But that's the whole point. Two guys who were never interested with men get together. It's a stereotypical plot. Ando wasn't predatory, he's desperate. You honestly can just replace him with a girl that's interested with Tokiwa and gave her the same similar excuse.
This whole plot can be executed with gay characters. If the goal of the plot is to have them "overcome" an obstacle for their love, their are so many ways that it can be achieved with gay characters. You have not really said anything that refutes that Ando is predatory. He forcefully kisses the MC, he confronts him in areas that he knows no one else will come in, he stays late just so he can be alone with the MC, he constantly inserts himself into the MC's space/plans, and he refuses to acknowledge a "no" for a long time. That is predatory and uncomfortable behavior. Ando is an especially harmful character because he is a gay man, not a woman. He is playing into really negative gay stereotypes. Yes, his character role could be replaced with a girl? But that's not the point I made in my post. I'm saying that because of the existing and damaging stereotypes which already exist around gay men being predatory, his character is harmful. Ultimately, I'm saying it's homophobic and exploitative to write a gay story and essentially make the straight characters the heros and the one gay character a villain. From my experience as a gay person, this story is homophobic.
You can acknowledge a story is bad but still personally enjoy it. Please don't break your back trying to excuse homophobia because acknowledging it makes you uncomfortable. Like...c'mon.
although i found this manga enjoyable, it definitely falls into some really unpleasant stereotypes. mainly, that although it's a gay love story, neither of the characters are depicted as gay. and even worse, the only actual gay character is predatory and villainous. ultimately, i feel like this manga is subtly homophobic, in the sense that it wants the drama of gay experiences but can't tolerate the inclusion of actual gay characters and instead uses "straight" protagonists.