A model for leptons is proposed, aiming to unify leptons and hadrons. The paper discusses the puzzle of muons and electrons, which have similar electromagnetic and weak interactions but differ in mass and behavior. The Higgs mechanism does not explain the muon mass, as it replaces it with a new constant. The paper suggests that the absence of strong interactions among leptons is due to a suppression mechanism, not a fundamental principle. It argues that current models treat quarks and leptons as fundamental, but leptons share properties with hadrons, not quarks. Thus, leptons may also be composed of fundamental objects. A simple model is proposed where a heavy lepton $ L_0 $ is bound to a quark-antiquark pair to form a lepton. The structure of leptons is given as: $$ \left\{\begin{array}{l}\mu^{-}\big/\left(\overline{{u}}s L_{\mathfrak{0}}\right)\big/\sim\left(K^{-}L_{\mathfrak{0}}\right),\\ \mu^{+}\big/\left(u\bar{s}\bar{L}_{\mathfrak{0}}\right)\big/\sim\left(K^{+}\bar{L}_{\mathfrak{0}}\right),\end{array}\right. $$ $$ \left\{\begin{array}{l}{{e^{-}\sim(\bar{u}d L_{0})\sim(\pi^{-}L_{0})\;,}}\\ {{e^{+}\sim(u\bar{d}\bar{L}_{0})\sim(\pi^{+}\bar{L}_{0})\;.}}\end{array}\right. $$ This model leads to decay processes like $ K^{-} \rightarrow \mu^{-} + e^{-} + \pi^{+} $, which may conflict with experimental data. The paper suggests modifying the model to include two heavy leptons $ L_1 $ and $ L_2 $, leading to a more comprehensive model. It concludes that the study of leptons requires a new approach, considering their possible interactions with hadrons and the role of heavy leptons in their structure.A model for leptons is proposed, aiming to unify leptons and hadrons. The paper discusses the puzzle of muons and electrons, which have similar electromagnetic and weak interactions but differ in mass and behavior. The Higgs mechanism does not explain the muon mass, as it replaces it with a new constant. The paper suggests that the absence of strong interactions among leptons is due to a suppression mechanism, not a fundamental principle. It argues that current models treat quarks and leptons as fundamental, but leptons share properties with hadrons, not quarks. Thus, leptons may also be composed of fundamental objects. A simple model is proposed where a heavy lepton $ L_0 $ is bound to a quark-antiquark pair to form a lepton. The structure of leptons is given as: $$ \left\{\begin{array}{l}\mu^{-}\big/\left(\overline{{u}}s L_{\mathfrak{0}}\right)\big/\sim\left(K^{-}L_{\mathfrak{0}}\right),\\ \mu^{+}\big/\left(u\bar{s}\bar{L}_{\mathfrak{0}}\right)\big/\sim\left(K^{+}\bar{L}_{\mathfrak{0}}\right),\end{array}\right. $$ $$ \left\{\begin{array}{l}{{e^{-}\sim(\bar{u}d L_{0})\sim(\pi^{-}L_{0})\;,}}\\ {{e^{+}\sim(u\bar{d}\bar{L}_{0})\sim(\pi^{+}\bar{L}_{0})\;.}}\end{array}\right. $$ This model leads to decay processes like $ K^{-} \rightarrow \mu^{-} + e^{-} + \pi^{+} $, which may conflict with experimental data. The paper suggests modifying the model to include two heavy leptons $ L_1 $ and $ L_2 $, leading to a more comprehensive model. It concludes that the study of leptons requires a new approach, considering their possible interactions with hadrons and the role of heavy leptons in their structure.