Kobato., Houkago no Pleiades (TV) Recommendations
Space and time, multiple universes, fragments/pieces, memory-loss, magic, indirect romance, kawaiiness, GP-rated moeness, CGDCT, if plot elements like these are what you're looking for, then look no further with Houkago no Pleiades and Kobato.
Both of these anime has space and time concepts, as Houkago no Pleiades deals with multiverses in quite the same way as CLAMP's universe for Kobato-- space and time with magic, if I may add.
Much more, both of these seem to be looking for "fragments" that looks like sugar candies, with the former on engine fragments, and the latter on konpeito. Still not satisfied? Then both main characters also deal with