Rubuta ci gaba don wannan sakin layi - Bayan lokacin da yake gamsarwa a Daegu, a cikin 2018 Júnior ya shiga tsoffin abokan hamayyarsa Ulsan Hyundai akan canja wuri kyauta. Ya fara bugawa Kim do-hoon jagora a ranar 13 ga Fabrairu, 2018, yana shigowa Yohei Toyoda a minti na 76 na wasan da suka tashi 3-3 a waje da Melbourne Victory a wasan farko na rukunin rukuni na AFC Champions League. Wasansa na farko a K League 1
ya kasance a zahiri a ranar 1 ga Maris, lokacin da ya maye gurbin abokin wasan farko Oh Se-hun a minti na 56 na rashin nasara 2-0 a kan Jeonbuk Hyundai Motors.