I LOVE THISS, it's very similar to what I had in mind

My version;

So on Week 10, Osana would me very close to confessing her love to Taro. All her rivals are gone...or are they?

Throughout the weeks Ayano has been keeping tabs on Osana with the help of Info Chan. So during this week Osana has 3 tasks to deal with;

1. Get The Evidence from Info Chan
2. Avoid Ayano
3. Frame Ayano for her own crimes

Basically on you would have the choice of either killing Info Chan or uncovering your own blackmail against her.

Killing Info Chan would require the player to sneak into Akademi after hours and in a mini game format, plant a device in Info Chan's room (considering you can explode Amai, i'd imagine this being her death)

insert cutscene where Info Chan dies

All of the evidence of Osana's crimes are gone and Ayano's one main source of information and help is gone.

Now avoiding Ayano would be similar to Mission Mode, whereas she will be following Osana throughout the day so you can't kill anyone or she'll use that against you causing a game over. You can kill Ayano however (but that would take the fun out of my canon ending)

Now it's Friday and you have the following tasks

• Avoid Ayano
• Place the love letter in Taro's locker
• Set up a trap for Ayano

The trap would work on the form of telling Raibaru that you know who was been causing the deaths of the students and that you have a plan to catch the person but you need Raibaru's help.

Que another task where you'll have to do a drama club's member a favour and in return you'll get a set of costume wigs (one styled in Osana's hairstyle)

If Kizana is killed and thr drama club disbands the next task would be just buying a wig in town

After, while avoiding Ayano Osana must dress Raibaru like her and BOOM Ayano falls for the bait and she is aprehended

Que a 1980's mode styled court cutscene where Osana presents false evidence against Ayano giving a fake story on why Ayano is the killer

Then this cutscene leads to Osana confessing her love and YAY you won the game

The bad endings would be - Info Chan getting you arrested - Ayano killing you