As discussed in the introduction, one of well-known failures of LR-TDDFT is the poor description of long-range charge transfer excitations, which is well illustrated in the charge-transfer state of Ethylene-Tetrafluoroethylene dimer (see Fig. ). The origin of the problem is the approximate XC functionals which, in general, do not exhibit the correct 1/R asymptotic behavior (R is the distance between the molecules). MRSF-TDDFT also suffers from the same issue, as MRSF-TDDFT curves calculated with BH&HLYP and DTCAM-VEE exhibit an asymptotic behavior of ∼ 0.5/R and 0.48/R, respectively in the relative energy of E(R)-E(4.0 Å) (Fig. ). On the other hand, the relative energies of E(R)-E(4.0 Å) by both CIS and XMCQDPT2 have the correct 1/R asymptotic behavior. Remarkably, DTCAM-AEE, where the especially large value of β 2 = 0.95 for the long-range part shows nearly perfect 1/R asymptotic behavior in Fig. . DTCAM-AEE also exhibits a high accuracy of absolute state energies as it is slightly lower than that of XMCQDPT2 in Fig. . The CIS overestimates the state energies, while MRSF-TDDFT with DTCAM-VEE and BH&HLYP underestimates it. Therefore, it is demonstrated that the 1/R asymptotic behavior with high accuracy can be recovered by adopting a large exact exchange for the long-range within the "adaptive exchange" idea, providing a new direction for developing XC functionals for CT states. This also implies that new functionals can also produce better ionization potentials and electron affinities.