健二は、自分がハンサムだとうぬぼれてる。

Kenji flatters himself that he is quite handsome.

健二(けんじ)は、自分(じぶん)がハンサムだとうぬぼれてる。

Kenji wa, jibun ga hansamu da to unuboreteru.

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

自分 (じぶん)

myself; yourself; oneself; himself; herself; I; me; you

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

ハンサム (ハンサム)

handsome

だ (だ)

be; is; indicates past or completed action; indicates light imperative

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

自惚れる (うぬぼれる)

to be conceited

Readings: ケン、すこ.やか

Meanings: healthy, health, strength, persistence

Readings: ニ、ジ、ふた、ふた.つ、ふたたび

Meanings: two, two radical (no.2)

Readings: ジ、シ、みずか.ら、おの.ずから、おの.ずと

Meaning: oneself

Readings: ブン、フン、ブ、わ.ける、わ.け、わ.かれる、わ.かる、わ.かつ

Meanings: part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100