To be utterly honest with you, I thought viewers exaggerate how painful the second lead syndrome was; however, after watching the endless times of Taichu being patient and true to Qianyu, I have to admit it's indeed painful. Rational and practical thinking would be choosing Taichu. Despite knowing Qianyu's lifestyle and background, Taichu still pursued courting her. He patiently explained business jargon to her during Senwell's meeting. Oh, and let's not forget how Qianyu entered Taichu's room while he was wearing just a towel. Hot and sexy indeed. I would definitely choose Taichu. Travelling the world with him seems like a dreamlike journey of love. Second lead syndrome at its finest indeed.
I feel bad for Airi despite the fact that she did terrible things to Oto. She only wanted attention and the love that she at least deserved. I cried at the part where the leader of C5 did not remember the secret hideout. He literally ignored Airi's feelings.