Can Someone Please Explain This Situation

Suddenly the poor aristocrat Viola received an unexpected marriage proposal from the prestigious noble household of Duke Physalis. A mediocre noble daughter and the handsome duke. Although just about everything is mismatched and puzzling, there were the duke’s personal reasons. Each one having their own circumstances, an agreement to a political marriage with ulterior motives. Will this path lead to happiness or sorrow?

• World of Warcraft: Foreign Realm Domination(Completed)
• Star Martial God Technique(Ongoing)
• I Only Need To Attend The Classroom Of The Sage To Level Up!(Ongoing)
• Global Lord: 100% Drop Rate(Ongoing)
• Boku wa Isekai de Fuyo Mahou to Shoukan Mahou wo Tenbin ni Kakeru(Ongoing)

• Chapter 46
• Chapter 45
• Chapter 30
• Chapter 5
• Chapter 4