Ayame Asano's manga / #SEXY(128)

I am very disappointed with this story. The art was amazing, the themes were so promising but... I think the author did not succeed to make a great story. I was lost the whole time... Who is an angel ? Who is a demon ? What are they REALLY doing in this company ? Is being gay ok ? Can they have children ? And... I don't know but it felt really really empty. The characters were all very lovely but... I don't know. A huge thing is missing.