Chapter 4 - Irene meets Ervin for the first time
Chapter 12 - Irene finds out that Ervin is the crown prince (end)
Chapter 17 - Ervin reveals that he's the crown prince to Irene (middle)
Chapter 19 - Nicholas confronts Irene about her real age (middleish)
Chapter 25 - Ervin misses Irene's birthday party, gives her a rose later as a gift (middle)
Chapter 29 - Irene and Roger bond over their shared hobby (end)
Chapter 39 - Ervin and Irene dance together (middleish)
Chapter 45 - Ervin thinks of what he should prepare for Irene (middle)
Chapter 50 - A mage interrogates Irene before Ervin shows up to rescue her
Chapter 61 - Uncle wants to keep Irene as his aide despite tormenting her (middle)
Chapter 63 - Time passes and Irene's about to turn 16 (middle end)
Chapter 69 - Irene makes a contract with Nicholas, she meets Ervin later
Chapter 73 - Irene gives Roger relationship advice, Ervin doesn't know and feels jealous (middle)
Chapter 76 - Ervin reveals that he has memorized all the letter Irene sent him (middle)
Chapter 79 - Ervin gets flustered when Irene gets close to him (middle end)
Chapter 81 - Ervin blushes when he sees Irene sleeping (middle)
Chapter 85 - Ervin kisses Irene's forehead, she disappears almost immediately after (middleish)
Chapter 88 - Ervin confesses to Irene while rescuing her from the mage tower
I’m Worried that My Brother is Too Gentle