CURRENTLY SCREAMING FROM HAPPINESSSSSSSS!!!!!
Alright so, I was looking for LINE icons, wondering if Miwasiba drew the Chapter 4 and Bonus Scenario characters. Then I clicked the first option for the CHEATS section, and found this.
Probably Incorrect Translation, But Close Enough: Although it is overseas, there is a wiki (unofficial) 1bitHeart Wiki
I think you can get why I'm bursting with happiness.