Yomi, Jealousy, and a Birthday / Iana and Sol's Feverish Day

Iana wants to surprise Yomi with a cake for his birthday, but when the kitchen blows up again, he forbids her from entering. She comes up with a new plan, but Yomi gets the wrong idea about it. When Iana comes down with a cold, she remembers being Satou in middle school and having to nurse herself back to health with no company but her imaginary allies. As Iana, things are different. Or are they?