fection . ▁ ▁In ▁February ▁ 2 0 0 7 , ▁Le ete uk ▁was ▁placed ▁in ▁the ▁tro t - sing ing ▁Super ▁Junior - T . ▁A ▁year ▁later , ▁Le ete uk ▁became ▁a ▁member ▁of ▁Super ▁Junior - H . ▁▁ 2 0 0 9 – 2 0 1 1 : ▁Vari ety ▁shows ▁and ▁MC ▁roles ▁ ▁From ▁ 2 0 0 9 ▁on wards , ▁Le ete uk , ▁along ▁with ▁E un hy uk ▁and ▁Sh ind ong , ▁were ▁regular ▁guests ▁on ▁S BS ' ▁Str ong ▁Heart , ▁where ▁they ▁hosted ▁a ▁special ▁segment , ▁Bo om ▁Academy , ▁head ed ▁by ▁ent ert ainer ▁Bo om . ▁In ▁October ▁ 2 0 0 9 , ▁when ▁Bo om ▁en list ed ▁for ▁mand atory ▁military ▁service , ▁Le ete uk ▁took ▁over ▁and ▁the ▁segment ' s ▁name ▁was ▁tempor arily ▁changed ▁to ▁Te uk ig ay o , ▁or ▁Te uk ▁Academy . ▁He ▁was ▁a ▁frequent ▁guest ▁on ▁Star ▁King , ▁also ▁on ▁S BS , ▁with ▁fellow ▁Super ▁Junior ▁members . ▁ ▁In ▁ 2 0 1 0 , ▁Le ete uk ▁became ▁the ▁new ▁MC ▁for ▁M BC ▁En jo y ▁Today , ▁replacing ▁Big ▁Bang ' s ▁Se ung ri ▁who ▁left ▁to ▁focus ▁on ▁Big ▁Bang ' s ▁new ▁album . ▁On ▁the ▁show , ▁Le ete uk ▁sang ▁with ▁f ( x )' s ▁K ry stal ▁for ▁the ▁song ▁" Gr umb ing ". ▁Le